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127-556: SSRL provides experimental facilities to some 2,000 academic and industrial scientists working in such varied fields as drug design, environmental cleanup, electronics, and x-ray imaging . It is located in San Mateo County , in the city of Menlo Park , California, close to the Stanford University main campus. In 1972, the first x-ray beamline was constructed by Ingolf Lindau and Piero Pianetta as literally

254-597: A "hole in the wall" extending off of the SPEAR storage ring. SPEAR had been built in an era of particle colliders , where physicists were more interested in smashing particles together in hope of discovering antimatter than in using x-ray radiation for solid state physics and chemistry. From those meager beginnings the Stanford Synchrotron Radiation Project (SSRP) began. Within a short time SSRP had five experimental hutches that each used

381-442: A 103-foot (31 m) tall cross built in 1934. Dominating this area is Sutro Tower , a large red and white radio and television transmission tower reaching 1,811 ft (552 m) above sea level. The nearby San Andreas and Hayward Faults are responsible for much earthquake activity, although neither physically passes through the city itself. The San Andreas Fault caused the earthquakes in 1906 and 1989. Minor earthquakes occur on

508-734: A 2023 estimated population of over 9 million. Prior to European settlement , the modern city proper was inhabited by the Yelamu , who spoke a language now referred to as Ramaytush Ohlone . On June 29, 1776, settlers from New Spain established the Presidio of San Francisco at the Golden Gate , and the Mission San Francisco de Asís a few miles away, both named for Francis of Assisi . The California gold rush of 1849 brought rapid growth, transforming an unimportant hamlet into

635-416: A GDP of $ 729 billion in 2022 . The wider San Jose–San Francisco–Oakland Combined Statistical Area is the nation's fifth-most populous, with around nine million residents, and the third-largest by economic output, with a GDP of $ 1.32 trillion in 2022 . In the same year, San Francisco proper had a GDP of $ 252.2 billion, and a GDP per capita of $ 312,000. San Francisco was ranked fifth in the world and second in

762-578: A busy port, making it the largest city on the West Coast at the time; between 1870 and 1900, approximately one quarter of California's population resided in the city proper. In 1856, San Francisco became a consolidated city-county . After three-quarters of the city was destroyed by the 1906 earthquake and fire , it was quickly rebuilt, hosting the Panama–Pacific International Exposition nine years later. In World War II , it

889-623: A common place to live for people employed in Silicon Valley companies such as Apple and Google . The early 2020s featured an exodus of tech companies from Downtown San Francisco in the wake of the COVID-19 pandemic and struggles with homelessness and public drug use. Although some observers have raised the possibility that office vacancies and declining tax revenues could cause San Francisco to enter an economic doom loop , other sources have refuted this broad-based characterization of

1016-647: A flood of treasure seekers (known as "forty-niners," as in "1849"). With their sourdough bread in tow, prospectors accumulated in San Francisco over rival Benicia , raising the population from 1,000 in 1848 to 25,000 by December 1849. The promise of wealth was so strong that crews on arriving vessels deserted and rushed off to the gold fields, leaving behind a forest of masts in San Francisco harbor. Some of these approximately 500 abandoned ships were used at times as storeships , saloons , and hotels; many were left to rot, and some were sunk to establish title to

1143-458: A fort on Alcatraz Island to secure San Francisco Bay. San Francisco County was one of the state's 18 original counties established at California statehood in 1850. Until 1856, San Francisco's city limits extended west to Divisadero Street and Castro Street, and south to 20th Street. In 1856, the California state government divided the county. A straight line was then drawn across the tip of

1270-484: A gourmet marketplace. San Francisco has a warm-summer Mediterranean climate ( Köppen : Csb , Trewartha : Csll), characteristic of California's coast, with moist winters and dry summers. San Francisco's weather is strongly influenced by the cool currents of the Pacific Ocean on the west side of the city, and the water of San Francisco Bay to the north and east. This moderates temperature swings and produces

1397-566: A large African American population after World War II . The Western Addition is usually divided into smaller neighborhoods including Hayes Valley , the Fillmore , and Japantown , which was once the largest Japantown in North America but suffered when its Japanese American residents were forcibly removed and interned during World War II. The Western Addition survived the 1906 earthquake with its Victorians largely intact, including

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1524-599: A magnet for America's counterculture movement . Beat Generation writers fueled the San Francisco Renaissance and centered on the North Beach neighborhood in the 1950s. Hippies flocked to Haight-Ashbury in the 1960s, reaching a peak with the 1967 Summer of Love . In 1974, the Zebra murders left at least 16 people dead. In the 1970s, the city became a center of the gay rights movement , with

1651-502: A median household income of $ 128,091, the fourth-highest household income of any county in the nation behind Loudoun County, Virginia , Falls Church, Virginia , and Santa Clara County, California . The county covers most of the San Francisco Peninsula . The county is predominantly suburban and is home to many corporate campuses. San Mateo County was formed in 1856 upon the division of San Francisco County, one of

1778-539: A political party preference. Every city, town, and unincorporated area of San Mateo County has more registered Democrats than Republicans. On November 4, 2008, San Mateo County voted 61.8% against Proposition 8 , which amended the California Constitution to ban same-sex marriages. The following table includes the number of incidents reported and the rate per 1,000 persons for each type of offense . A July 2013 Wall Street Journal article identified

1905-485: A population of 808,988 residents as of 2023, San Francisco is the fourth-most populous city in the U.S. state of California behind Los Angeles , San Diego , and San Jose . It covers a land area of 46.9 square miles (121 square kilometers) at the upper end of the San Francisco Peninsula , making it the second-most densely populated major U.S. city behind New York City and the fifth-most densely populated U.S. county , behind four of New York City's boroughs . Among

2032-440: A port and naval base, post-Conquest San Francisco was still a small settlement with inhospitable geography. Situated at the tip of a windswept peninsula without water or firewood, San Francisco lacked most of the basic facilities for a 19th-century settlement. These natural disadvantages forced the town's residents to bring water, fuel and food to the site. Its 1847 population was said to be 459. The California gold rush brought

2159-542: A private, forested property near Pescadero, on the San Mateo County Coast, where it was photographed by a motion-activated wildlife camera. Harold Heath, professor emeritus, of Stanford University was responsible for the 1904 sighting, 1 mile (1.6 km) west of the university campus. Pumas ( Puma concolor ), also known as cougars or mountain lions, roam the county. Tule elk ( Cervus canadensis nannodes ) were native to San Mateo County and among

2286-424: A regular basis. The threat of major earthquakes plays a large role in the city's infrastructure development. The city constructed an auxiliary water supply system and has repeatedly upgraded its building codes, requiring retrofits for older buildings and higher engineering standards for new construction. However, there are still thousands of smaller buildings that remain vulnerable to quake damage. USGS has released

2413-581: A settlement, an arroyo , a headland jutting into the Pacific ( Point Montara ), and a large land holding ( Rancho San Mateo ). Until about 1850, the name appeared as San Matheo . The Japanese first arrived in San Mateo County and were part of a group guided by Ambassador Tomomi Iwakura in 1872. A number of male Japanese students came to San Mateo to learn English and many other helpful skills to bring back to Japan. These students were also some of

2540-603: A significant portion of the Comstock Lode 's gold and silver mines, establishing a virtual monopoly. Using his incredible clout, Ralston was able to generate millions of dollars for San Francisco during its heady boom years. He founded the Bank of California , the first bank in the Western United States, and built the opulent Palace Hotel, a symbol of San Francisco's newfound prosperity and the largest hotel in

2667-473: A spacious public park, resulting in plans for Golden Gate Park . San Franciscans built schools, churches, theaters, and all the hallmarks of civic life. The Presidio developed into the most important American military installation on the Pacific coast. By 1890, San Francisco's population approached 300,000, making it the eighth-largest city in the United States at the time. Around 1901, San Francisco

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2794-484: A wave of " Manhattanization " that lasted until the late 1980s, a period of extensive high-rise development downtown. The 1980s also saw a dramatic increase in the number of homeless people in the city, an issue that remains today, despite many attempts to address it. The 1989 Loma Prieta earthquake caused destruction and loss of life throughout the Bay Area. In San Francisco, the quake severely damaged structures in

2921-801: Is Mexican, 2.7% Salvadoran, 1.2% Guatemalan, 1.2% Nicaraguan, 0.7% Peruvian, 0.6% Puerto Rican, 0.2% Colombian, and 0.2% Cuban. As of the census of 2009, there were 714,936 people, 258,648 households, and 174,582 families residing in the county. The population density was 2,753 people per square mile (1,063 people/km ). There were 284,471 housing units at an average density of 789 units per square mile (305 units/km ). 7.4% were of Italian , 7.1% Irish , 7.0% German and 5.3% English ancestry according to Census 2000 . 46.9% spoke English , 28.4% Spanish , 6.2% Tagalog , 4.0% Chinese or Mandarin and 1.1% Cantonese , and other language 4.2%, as their first language from estimate census 2009. There were 258,648 households, out of which 30% had children under

3048-431: Is a residential school that teaches major concepts of ecology via exploration of forest, pond, garden, tidepool , wetland , and sandy shore habitats . The center's mascot is the banana slug , a large yellow gastropod . The school uses songs from the famous Banana Slug String Band . They include: Offering secondary (6–12) education: There are three community colleges in San Mateo County, all of which belong to

3175-553: Is also served by the local Catholic diocese and many other private parochial and secular schools. The San Mateo County Board of Education oversees early education, special education, and the court and community schools program in the county, as well as serves as an appeal board for the adjudication of expulsion appeals, interdistrict attendance appeals, and charter schools. Some students in San Mateo County's public schools attend outdoor education in La Honda . San Mateo Outdoor Education

3302-494: Is essentially their original form, but most of the city's natural watercourses, such as Islais Creek and Mission Creek , have been partially or completely culverted and built over. Since the 1990s, however, the Public Utilities Commission has been studying proposals to daylight or restore some creeks. An Historical Center of San Francisco monument, where the 1899–1906 City Hall was once located,

3429-408: Is gone." Rebuilding was rapid and performed on a grand scale. Rejecting calls to completely remake the street grid, San Franciscans opted for speed. Amadeo Giannini 's Bank of Italy , later to become Bank of America , provided loans for many of those whose livelihoods had been devastated. The influential San Francisco Planning and Urban Research Association or SPUR was founded in 1910 to address

3556-583: Is in United Nations Plaza , at 37°46′48″N 122°24′49″W  /  37.7800397°N 122.4135943°W  / 37.7800397; -122.4135943 The earliest center of San Francisco is Portsmouth Square , in the northeast quadrant of the city anchored by Market Street and the waterfront. Here in the northeast quadrant, the Financial District is centered, with Union Square , the principal shopping and hotel district, and

3683-599: Is split between three legislative districts: In the California State Senate , San Mateo is split between the 11th and 13th districts, represented by Scott Wiener and Josh Becker , respectively. The California Secretary of State, as of February 2019, reports that San Mateo County has 404,958 registered voters. Of those voters, 202,341 (50%) are registered Democratic, 60,045 (14.3%) are registered Republican, 15,834 (3.9%) are registered with other political parties, and 126,738 (31.3%) declined to state

3810-699: Is substituted by All Nighter bus service , split between SamTrans routes 397 (replacing Caltrain between San Francisco and Palo Alto via SFO) and ECR Owl (replacing BART between Daly City and SFO). San Francisco International Airport is geographically located in San Mateo County, east of Highway 101 near San Bruno and Millbrae , but it is owned and operated by the City and County of San Francisco . San Mateo County owns two general aviation airports: Half Moon Bay Airport and San Carlos Airport . The only deepwater port in South San Francisco Bay

3937-687: Is the Port of Redwood City , situated along Redwood Creek , originally created as a lumber embarcadero in 1850. The San Mateo Harbor Harbor District manages the Pillar Point Harbor (on the Pacific coast side) and Oyster Point Marina (on San Francisco Bay). San Francisco San Francisco , officially the City and County of San Francisco , is a commercial, financial , and cultural center within Northern California . With

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4064-555: The 2020 census , the population was 764,442. Redwood City is the county seat , the third-most populated city in the county after Daly City and San Mateo . San Mateo County is included in the San Francisco–Oakland–Berkeley, CA MSA ( metropolitan statistical area ), Silicon Valley , and is part of the San Francisco Bay Area , the nine counties bordering San Francisco Bay . As of 2020, it has

4191-638: The Bear Flag Revolt in Sonoma and the beginning of the U.S. Conquest of California , American forces from the USS Portsmouth under the command of John B. Montgomery captured Yerba Buena on July 9, 1846, with little resistance from the local Californio population, raising the American flag over Yerba Buena plaza (later renamed Portsmouth Square in commemoration of this event). Following

4318-578: The California earthquake forecast which models earthquake occurrence in California. San Francisco's shoreline has grown beyond its natural limits. Entire neighborhoods such as the Marina , Mission Bay , and Hunters Point , as well as large sections of the Embarcadero , sit on areas of landfill . Treasure Island was constructed from material dredged from the bay as well as material resulting from

4445-523: The Facebook initial public offering (IPO) as the cause of a change in the U.S.' national economic statistics, as San Mateo County—the home of the company—became the top wage-earning county in the country after the fourth quarter of 2012. The article revealed that the Bureau of Labor Statistics reported that the average weekly wage in the county was $ 3,240, which is 107% higher than the previous year: "That's

4572-838: The Golden Gate Bridge , cable cars , and Alcatraz . The city is home to a number of educational and cultural institutions, such as the University of California, San Francisco , the University of San Francisco , San Francisco State University , the San Francisco Conservatory of Music , the de Young Museum , the San Francisco Museum of Modern Art , the San Francisco Symphony , the San Francisco Ballet ,

4699-501: The Marina and South of Market districts and precipitated the demolition of the damaged Embarcadero Freeway and much of the damaged Central Freeway , allowing the city to reclaim The Embarcadero as its historic downtown waterfront and revitalizing the Hayes Valley neighborhood. The two recent decades have seen booms driven by the internet industry. During the dot-com boom of the late 1990s, startup companies invigorated

4826-783: The Palo Alto Transit Center in Santa Clara County and Salesforce Transit Center in San Francisco. Approximately 2 ⁄ 3 of all SamTrans bus routes travel along El Camino Real , and route ECR, the primary bus route on El Camino, carries approximately 25% of SamTrans ridership. Each Caltrain and BART station has connections to SamTrans routes. In addition, Daly City station is served by SF Muni bus routes. There are many free shuttles that operate from Caltrain, BART, and Ferry stations along fixed routes to local employers during weekday commuting hours (6–10 AM and 3–7 PM). Overnight rail service

4953-760: The San Francisco Bay estuarine shoreline, San Bruno Mountain , Fitzgerald Marine Reserve and the forests on the Montara Mountain block. Several creeks discharge to the San Francisco Bay, including San Mateo Creek and Laurel Creek, and several coastal streams discharge to the Pacific Ocean , such as Frenchmans Creek and San Vicente Creek . Año Nuevo State Marine Conservation Area and Greyhound Rock State Marine Conservation Area are two adjoining marine protected areas off

5080-848: The San Francisco Opera , the SFJAZZ Center , and the California Academy of Sciences . Two major league sports teams, the San Francisco Giants and the Golden State Warriors , play their home games within San Francisco proper. San Francisco International Airport (SFO) offers flights to over 125 destinations, while a light rail and bus network , in tandem with the BART and Caltrain systems, connects nearly every part of San Francisco with

5207-569: The San Mateo County Community College District : Caltrain , the commuter rail system, connects ten cities in the county with San Francisco (to the north) and San Jose / Gilroy (to the south), running between the Highway 101 and El Camino Real corridors for most of the way. There are 13 stations in San Mateo County , of which 12 have daily service; the ten cities with stations stretch from Brisbane on

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5334-501: The Tenderloin nearby. Cable cars carry riders up steep inclines to the summit of Nob Hill , once the home of the city's business tycoons, and down to the waterfront tourist attractions of Fisherman's Wharf , and Pier 39 , where many restaurants feature Dungeness crab from a still-active fishing industry. Also in this quadrant are Russian Hill , a residential neighborhood with the famously crooked Lombard Street ; North Beach ,

5461-581: The "favored foods" of the Ohlone people based on ethnohistoric and archeological evidence there. The discovery of two elk specimens made news in 1962, one a royal elk (royal elk bulls have six tines per antler) from a peat bog excavated in Pacifica's historic Laguna Alta, and now in the Museum of Vertebrate Zoology collection. These may date from the time of Spanish settlement. Laguna Alta lay just south of

5588-466: The 1910s, a wave of Central American immigrants settled in the Mission and, in the 1950s, immigrants from Mexico began to predominate. In recent years, gentrification has changed the demographics of parts of the Mission from Latino, to twenty-something professionals. Noe Valley to the southwest and Bernal Heights to the south are both increasingly popular among young families with children. East of

5715-409: The 92 U.S. cities proper with over 250,000 residents, San Francisco is ranked first by per capita income and sixth by aggregate income as of 2022. San Francisco anchors the 13th most populous metropolitan statistical area in the United States , with almost 4.6 million residents in 2023. The larger San Jose–San Francisco–Oakland combined statistical area , the fifth-largest urban region in the U.S., had

5842-535: The Bay Area a center for trade. Catering to the needs and tastes of the growing population, Levi Strauss opened a dry goods business and Domingo Ghirardelli began manufacturing chocolate. Chinese immigrants made the city a polyglot culture, drawn to "Old Gold Mountain," creating the city's Chinatown quarter. By 1880, Chinese made up 9.3% of the population. The first cable cars carried San Franciscans up Clay Street in 1873. The city's sea of Victorian houses began to take shape, and civic leaders campaigned for

5969-705: The Birdman of Alcatraz. San Francisco later celebrated its regained grandeur with a World's fair , the Golden Gate International Exposition in 1939–40, creating Treasure Island in the middle of the bay to house it. During World War II , the city-owned Sharp Park in Pacifica was used as an internment camp to detain Japanese Americans . Hunters Point Naval Shipyard became a hub of activity, and Fort Mason became

6096-607: The Board of Supervisors will cease to be elected by an at-large vote of all the voters in the county, but is instead elected only by the voters of his or her district. San Mateo County is split between California's 15th and 16th congressional districts, represented by Kevin Mullin ( D – South San Francisco ) and Anna Eshoo ( D – Atherton ), respectively. In the California State Assembly , San Mateo County

6223-852: The Interstate 280 and Skyline Boulevard intersection, east of Mussel Rock. The California Academy of Sciences also has an elk skull fragment collected one mile inland from the mouth of Purisima Creek in 1951. Additional coastal elk remains dating from the Middle and Late Periods in Northern California were found in at least five more late Holocene archeological sites in San Mateo County: SMA-115 ( Montara State Beach site), SMA-118 ( Bean Hollow State Beach site), SMA-244 ( Butano Ridge site), SMA-97 ( Año Nuevo Creek site) and SMA-218 (Año Nuevo State Reserve site). On

6350-522: The Mission is the Potrero Hill neighborhood, a mostly residential neighborhood that features sweeping views of downtown San Francisco. West of the Mission, the area historically known as Eureka Valley , now popularly called the Castro , was once a working-class Scandinavian and Irish area. It has become North America's first gay village , and is now the center of gay life in the city. Located near

6477-731: The Outer Richmond and Outer Sunset can refer to the more western portions of their respective district and the Inner Richmond and Inner Sunset can refer to the more eastern portions. Many piers remained derelict for years until the demolition of the Embarcadero Freeway reopened the downtown waterfront, allowing for redevelopment. The centerpiece of the port, the Ferry Building , while still receiving commuter ferry traffic, has been restored and redeveloped as

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6604-481: The Pacific Ocean, and named Redwood City as the county seat. San Mateo County then annexed part of northern Santa Cruz County in March 1868, including Pescadero and Pigeon Point . Although the formation bill named Redwood City the county seat, a May 1856 election marked by "unblushing frauds perpetuated on an unorganized and wholly unprotected community by thugs and ballot stuffers from San Francisco" named Belmont

6731-531: The Presidio garrison, commanded by Mariano Vallejo , relocated to the Presidio of Sonoma , which was regarded as needing a greater military presence due the proximity of the Russian settlement at Fort Ross . Only a small detachment remained at the Presidio of San Francisco. Mission Dolores sold most of its property in 1836, retaining only the church and related structures. In 1833, Juana Briones de Miranda

6858-700: The SPEAR storage ring is dedicated completely to the Stanford Synchrotron Radiation Lightsource as part of the SLAC National Accelerator Laboratory facility. SSRL currently operates 24/7 for about nine months each year; the remaining time is used for major maintenance and upgrades where direct access to the storage ring is needed. There are currently 17 beamlines and over 30 unique experimental stations which are made available to users from universities, government labs, and industry from all over

6985-517: The San Francisco Peninsula just north of San Bruno Mountain . Everything south of the line became the new San Mateo County while everything north of the line became the new consolidated City and County of San Francisco. The California Gold Rush triggered a wave of entrepreneurial activity as individuals sought to capitalize on the newfound wealth. The discovery of silver deposits, notably the Comstock Lode in Nevada in 1859, further fueled rapid population growth and economic expansion. San Francisco, as

7112-405: The San Francisco economy. Large numbers of entrepreneurs and computer application developers moved into the city, followed by marketing, design, and sales professionals, changing the social landscape as once poorer neighborhoods became increasingly gentrified . Demand for new housing and office space ignited a second wave of high-rise development, this time in the South of Market district. By 2000,

7239-400: The Spanish ship San Carlos , commanded by Juan Manuel de Ayala , became the first ship to anchor in the bay. Soon after, on March 28, 1776, Anza established the Presidio of San Francisco . On October 9, Mission San Francisco de Asís , also known as Mission Dolores, was founded by Padre Francisco Palóu . In 1794, the Presidio established the Castillo de San Joaquín , a fortification on

7366-417: The United States on the Global Financial Centres Index as of September 2023 . Despite a continuing exodus of businesses from the downtown area of San Francisco, the city is still home to numerous companies inside and outside of technology, including Salesforce , Uber , Airbnb , X , Levi's , Gap , Dropbox , and Lyft . In 2022, San Francisco had more than 1.7 million international visitors –

7493-459: The age of 18, 15.9% from 18 to 24, 25.8% from 25 to 44, 21% from 45 to 64, and 9.7% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 97.8 males. For every 100 females age 18 and over, there were 95.1 males. The median income for a household in the county was $ 69,306, and the median income for a family was $ 77,737. Males had a median income of $ 48,342 versus $ 45,383 for females. The per capita income for

7620-405: The age of 18, 48.6% were married couples living together, 14.7% had a female householder with no husband present, and 41.7% were non-families. 31.5% of all households were made up of individuals, and 6.2% had someone living alone who was 65 years of age or older. The average household size was 3.79 and the average family size was 4.44. In the county, the population was spread out, with 28.6% under

7747-405: The area. Further development is taking place just to the south in Mission Bay area, a former railroad yard, which now has a second campus of the University of California, San Francisco and Chase Center , which opened in 2019 as the new home of the Golden State Warriors . West of downtown, across Van Ness Avenue , lies the large Western Addition neighborhood, which became established with

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7874-457: The arts and sciences, spurred by leading universities , high-tech , healthcare, finance, insurance, real estate, and professional services sectors. As of 2020 , the metropolitan area, with 4.5 million residents, ranked 5th by GDP ($ 874 billion) and 2nd by GDP per capita ($ 131,082) across the OECD countries, ahead of global cities like Paris , London , and Singapore . It is the fourth-largest by aggregate income and economic output, with

8001-429: The beginning of the assimilation of the Ramaytush people, and the decline of their language and culture. The Spanish Empire claimed San Francisco as part of Las Californias , a province of the Viceroyalty of New Spain . The Spanish first arrived in what is now San Francisco on November 2, 1769, when the Portolá expedition led by Don Gaspar de Portolá and Juan Crespí arrived at San Francisco Bay . Having noted

8128-420: The beginning. According to the U.S. Census Bureau , the county has a total area of 741 square miles (1,920 km ), of which 448 square miles (1,160 km ) is land and 293 square miles (760 km ) (40%) is water. It is the third-smallest county in California by land area. A number of bayside watercourses drain the eastern part of the county including San Bruno Creek and Colma Creek . Streams draining

8255-426: The capture, U.S. forces appointed both José de Jesús Noé and Washington Allon Bartlett to serve as co- alcaldes (mayors), while the conquest continued on in the rest of California. On January 30, 1847, Mayor Bartlett ordained that the city should officially change its name from "Yerba Buena" to "San Francisco", as the former name was only locally recognized and the latter name was in use on international maps. There

8382-424: The cities of Belmont and San Mateo . The endangered wildflower Hickman's potentilla is found near the Pacific Ocean on the lower slopes of Montara Mountain . The endangered wildflowers White-rayed pentachaeta , Pentachaeta bellidiflora , San Mateo Woolly Sunflower , Eriophyllum latilobum , Marin Dwarf Flax , Hesperolinon congestum and the San Mateo Thornmint , Acanthomintha duttonii , are found in

8509-400: The city and burned out of control for several days. With water mains out of service, the Presidio Artillery Corps attempted to contain the inferno by dynamiting blocks of buildings to create firebreaks. More than three-quarters of the city lay in ruins, including almost all of the downtown core. Contemporary accounts reported that 498 people died, though modern estimates put the number in

8636-465: The city as a whole, asserting that the issues of concern are restricted primarily to the urban core of San Francisco. As of March 2024, Union Square was in "sorry shape" and had lost its traditional position as the Bay Area's regional shopping hub to Westfield Valley Fair in San Jose. The Ferry Station Post Office Building , Armour & Co. Building , Atherton House , and YMCA Hotel are historic buildings among dozens of historical landmarks in

8763-484: The city's Little Italy and the former center of the Beat Generation ; and Telegraph Hill , which features Coit Tower . Abutting Russian Hill and North Beach is San Francisco's Chinatown , the oldest Chinatown in North America. The South of Market , which was once San Francisco's industrial core, has seen significant redevelopment following the construction of Oracle Park and an infusion of startup companies . New skyscrapers, live-work lofts, and condominiums dot

8890-479: The city's alcalde , renamed it from Yerba Buena (Spanish for "Good Herb"), which had been the name of the first civilian pueblo in San Francisco, as well as the name of Yerba Buena Cove , which the pueblo was on the shore of. Earlier in San Francisco's history, the uninhabited area on the northeastern side of San Francisco was called El Paraje de Yerba Buena , after the herb that was growing abundantly there. The name Yerba Buena continues to be used in locations in

9017-417: The city's population reached new highs, surpassing the previous record set in 1950. When the bubble burst in 2001 and again in 2023, many of these companies folded and their employees were laid off. Yet high technology and entrepreneurship remain mainstays of the San Francisco economy. By the mid-2000s (decade), the social media boom had begun, with San Francisco becoming a popular location for tech offices and

9144-576: The city's southern border, the Excelsior District is one of the most ethnically diverse neighborhoods in San Francisco. The Bayview-Hunters Point in the far southeast corner of the city is one of the poorest neighborhoods, though the area has been the focus of several revitalizing and urban renewal projects. The construction of the Twin Peaks Tunnel in 1918 connected southwest neighborhoods to downtown via streetcar, hastening

9271-571: The city, according to the National Register of Historic Places listings in San Francisco . San Francisco is located on the West Coast of the United States , at the north end of the San Francisco Peninsula and includes significant stretches of the Pacific Ocean and San Francisco Bay within its boundaries. Several picturesque islands — Alcatraz , Treasure Island and the adjacent Yerba Buena Island , and small portions of Alameda Island , Red Rock Island , and Angel Island —are part of

9398-814: The city, such as on Yerba Buena Island and in the Yerba Buena Center for the Arts and Yerba Buena Gardens . While people residing outside the San Francisco Bay Area use nicknames including "Frisco" and "San Fran", local residents in the Bay Area sometimes refer to San Francisco as "the City" or "SF". The choice of nickname a person uses is a common way for locals to distinguish long-time residents from tourists and recent arrivals. "San Fran" and "Frisco" are sometimes considered controversial as nicknames among San Francisco residents. The earliest archeological evidence of human habitation of

9525-432: The city. Also included are the uninhabited Farallon Islands , 27 miles (43 km) offshore in the Pacific Ocean. The mainland within the city limits roughly forms a "seven-by-seven-mile square," a common local colloquialism referring to the city's shape, though its total area, including water, is nearly 232 square miles (600 km ). There are more than 50 hills within the city limits. Some neighborhoods are named after

9652-517: The coast of San Mateo County. Like underwater parks, these marine protected areas help conserve ocean wildlife and marine ecosystems. The county is home to several endangered species including the San Francisco garter snake and the San Bruno elfin butterfly , both of which are endemic to San Mateo County. The endangered Ridgway's Rail is also found on the shores of San Francisco Bay, in

9779-465: The country at the time. His financial empire, however, collapsed in 1875 as a result of the Panic of 1873 , triggering a major economic crisis in San Francisco. Development of the Port of San Francisco and the establishment in 1869 of overland access to the eastern U.S. rail system via the newly completed Pacific Railroad (the construction of which the city only reluctantly helped support ) helped make

9906-777: The county had also operated Werder Pier for fishermen; it had been the western segment of the original 1929 vertical-lift bridge . In addition to the county-operated parks, San Mateo County voters created the Midpeninsula Regional Open Space District in 1972, administered by the Peninsula Open Space Trust , which owns several protected spaces within San Mateo County (as well as within Santa Clara and Santa Cruz counties). San Mateo County protected spaces administered by POST include: As of 2012, San Mateo County had one of

10033-458: The county seat, but the state supreme court overturned that election on February 24, 1875, and the county seat has remained at Redwood City ever since. San Mateo County bears the Spanish name for Saint Matthew . As a place name, San Mateo appears as early as 1776 in the diaries of Anza and Font. Several local geographic features were also designated San Mateo on early maps including variously:

10160-455: The county seat. The election results were declared illegal and the county government was moved to Redwood City, with land being donated from the original Pulgas Grant for the county government on February 27, 1858. Redwood City's status as county seat was upheld in two successive elections in May 1861 and December 9, 1873, defeating San Mateo and Belmont. Another election in May 1874 named San Mateo

10287-496: The county was $ 36,045. About 6.42% of families and 9.51% of the population were below the poverty line , including 10.01% of those under age 18 and 8.52% of those age 65 or over. San Mateo County has a five-member Board of Supervisors , representing five geographic districts, elected at-large until November 2012. On November 6, 2012, Measure B passed to amend the San Mateo County Charter so that each member of

10414-556: The county, as a Community Choice Aggregation program, an alternative to Pacific Gas and Electric . The people of San Mateo County may use the services of San Mateo County Libraries along with the Peninsula Library System and its dozens of branches, bookmobile and Library-a-Go-Go machine at the Millbrae BART/Caltrain station . The county is divided into several public school districts and

10541-533: The deep south and the west-central parts of the county are less densely populated with more rural environment and coastal beaches areas. San Mateo County straddles the San Francisco Peninsula , with the Santa Cruz Mountains running its entire length. The county encompasses a variety of habitats, including estuarine , marine, oak woodland, redwood forest, coastal scrub and oak savannah. There are numerous species of wildlife present, especially along

10668-683: The development of West Portal , and nearby affluent Forest Hill and St. Francis Wood . Further west, stretching all the way to the Pacific Ocean and north to Golden Gate Park lies the vast Sunset District , a large middle-class area with a predominantly Asian population. The northwestern quadrant of the city contains the Richmond , a mostly middle-class neighborhood north of Golden Gate Park, home to immigrants from other parts of Asia as well as many Russian and Ukrainian immigrants. Together, these areas are known as The Avenues . These two districts are each sometimes further divided into two regions:

10795-523: The eastern side of the San Francisco Peninsula , elk remains were also unearthed at multiple archaeological sites along San Francisquito Creek . The County of San Mateo Parks Department operates 22 parks, trails, and historic sites spread throughout the county; the first, Memorial Park , was dedicated on July 4, 1924. The County Superintendent of Schools, Roy Cloud, had visited a one-room schoolhouse in Harrison Canyon as part of his duties; at

10922-509: The emergence of The Castro as an urban gay village , the election of Harvey Milk to the Board of Supervisors , and his assassination , along with that of Mayor George Moscone , in 1978. Bank of America , now based in Charlotte , North Carolina , was founded in San Francisco; the bank completed 555 California Street in 1969. The Transamerica Pyramid was completed in 1972, igniting

11049-500: The equivalent of $ 168,000 a year, and more than 50% higher than the next highest county, New York County (better known as Manhattan), which came in at $ 2,107 a week, or roughly $ 110,000 a year." As of the fourth quarter of 2021, the median value of homes in San Mateo County was $ 1,247,070, an increase of 11% from the prior year. It ranked fourth in the U.S. for counties with highest median home value, behind Nantucket , Manhattan , and Santa Clara . Additionally, San Mateo County hosts

11176-774: The excavation of the Yerba Buena Tunnel through Yerba Buena Island during the construction of the Bay Bridge. Such land tends to be unstable during earthquakes. The resulting soil liquefaction causes extensive damage to property built upon it, as was evidenced in the Marina district during the 1989 Loma Prieta earthquake . A few natural lakes and creeks ( Lake Merced , Mountain Lake , Pine Lake , Lobos Creek , El Polin Spring ) are within parks and remain protected in what

11303-520: The fact that there were no churches to be found, prompted missionaries like William Taylor to come to San Francisco where he began preaching in the streets, using an upright barrel as his pulpit. Taylor was able to garner enough generous donations from successful gold miners with which he used to build a church. One of the most influential figures of this era was William Chapman Ralston . A shrewd banker and investor, Ralston amassed considerable wealth and influence in San Francisco. He gained control over

11430-497: The famous " Painted Ladies ," standing alongside Alamo Square . To the south, near the geographic center of the city is Haight-Ashbury , famously associated with 1960s hippie culture. The Haight is now home to some expensive boutiques and a few controversial chain stores, although it still retains some bohemian character. North of the Western Addition is Pacific Heights , an affluent neighborhood that features

11557-407: The fifth-most visited city from abroad in the United States after New York City, Miami , Orlando , and Los Angeles – and approximately 20 million domestic visitors for a total of 21.9 million visitors. It is known for its steep rolling hills and eclectic mix of architecture across varied neighborhoods , its Chinatown and Mission districts, its cooling summers, fog , and landmarks including

11684-617: The first Japanese to join American students in the Belmont School for Boys. These students had to work for their housing and food before classes and in the evenings. Many of the first Japanese immigrants were able to find jobs as gardeners and landscapers in San Mateo. Most of them had a good educational background from their homelands, but their lack of knowledge of the English language made it difficult for them to find other jobs in

11811-610: The first land grant in Yerba Buena: to William Richardson , a naturalized Mexican citizen of English birth. Richardson had arrived in San Francisco aboard a whaling ship in 1822. In 1825, he married Maria Antonia Martinez, eldest daughter of the Californio Ygnacio Martínez . Yerba Buena began to attract American and European settlers; an 1842 census listed 21 residents (11%) born in the United States or Europe, as well as one Filipino merchant. Following

11938-518: The gateway to the goldfields, experienced a surge in population and commercial activity. However, the influx of fortune seekers also brought challenges. Lawlessness was rampant, and the Barbary Coast district became synonymous with vice, attracting criminals, prostitutes, and illicit activities, including but not limited to prostitution, bootlegging , and gambling. The rapidly growing population, with its lawlessness, gambling and other vices, and

12065-467: The headquarters of Visa Inc , Sony Interactive Entertainment , Electronic Arts , YouTube , Genentech , GoPro , and Gilead Sciences , as well as a hub of venture capital firms in Menlo Park and several other technology-related companies. In 2016, Peninsula Clean Energy began providing electricity to 20 percent of residential customers, all municipalities, and all small- to mid-size businesses in

12192-457: The hill on which they are situated, including Nob Hill , Potrero Hill , and Russian Hill . Near the geographic center of the city, southwest of the downtown area, are a series of less densely populated hills. Twin Peaks , a pair of hills forming one of the city's highest points, forms an overlook spot. San Francisco's tallest hill, Mount Davidson , is 928 feet (283 m) high and is capped with

12319-562: The homes built by wealthy San Franciscans in the wake of the 1906 earthquake. Directly north of Pacific Heights facing the waterfront is the Marina , a neighborhood popular with young professionals that was largely built on reclaimed land from the Bay. In the southeast quadrant of the city is the Mission District —populated in the 19th century by Californios and working-class immigrants from Germany, Ireland, Italy, and Scandinavia. In

12446-538: The larger Port of Oakland . The city began to lose industrial jobs and turned to tourism as the most important segment of its economy. The suburbs experienced rapid growth, and San Francisco underwent significant demographic change, as large segments of the white population left the city, supplanted by an increasing wave of immigration from Asia and Latin America. From 1950 to 1980, the city lost over 10 percent of its population. Over this period, San Francisco became

12573-732: The largest Tongan communities outside of Tonga , with an estimated 13,000 Tongan Americans . The 2010 United States Census reported that San Mateo County had a population of 718,451. The racial makeup of San Mateo County was 383,535 (53.4%) White , 20,436 (2.8%) African American , 3,306 (0.5%) Native American , 178,118 (24.8%) Asian (9.8% Filipino, 9.0% Chinese, 1.9% Indian, 1.2% Japanese, 0.8% Korean, 0.5% Vietnamese, 0.3% Burmese, 0.1% Pakistani), 10,317 (1.4%) Pacific Islander (0.6% Tongan, 0.3% Samoan, 0.2% Fijian, 0.1% Native Hawaiian), 84,529 (11.8%) from other races , and 38,210 (5.3%) from two or more races. Hispanic or Latino of any race were 182,502 persons (25.4%); 15.7% of San Mateo County

12700-419: The missions were made to divest themselves of their extensive landholdings and emancipate the indigenous people under their control. As part of the process of secularization, Governor José Figueroa opened up San Francisco to civilian settlement. Prior to secularization, the only settlements in San Francisco had been the military settlement at the Presidio and the religious settlement at Mission Dolores. In 1835,

12827-424: The new San Mateo County while everything north of the line became the new consolidated City and County of San Francisco . San Mateo County was officially organized on April 18, 1857, under a bill introduced by Senator T.G. Phelps . The 1857 bill defined the southern boundary of San Mateo County as following the south branch of San Francisquito Creek to its source in the Santa Cruz Mountains and thence due west to

12954-513: The north to Menlo Park on the south. Bay Area Rapid Transit (BART) trains serve San Francisco International Airport (SFO) and the northern portion of the county, paralleling El Camino Real / Mission Boulevard at six stations between Daly City and Millbrae , including the station at SFO. The only direct connection between Caltrain and BART is at Millbrae station . SamTrans (San Mateo County Transit District) provides local bus service within San Mateo County with some routes connecting to

13081-484: The period of Mexican rule , although it was not until 1833 that the missions would be secularized. Agricultural land became largely privatized as ranchos , as was occurring in other parts of California. Coastal trade increased, including a half-dozen barques from various Atlantic ports which regularly sailed in California waters. With the enactment of the Mexican Secularization Act of 1833 ,

13208-585: The primary port of embarkation for service members shipping out to the Pacific Theater of Operations . The explosion of jobs drew many people, especially African Americans from the South , to the area. After the end of the war, many military personnel returning from service abroad and civilians who had originally come to work decided to stay. The United Nations Charter creating the United Nations

13335-605: The quality of housing after the earthquake. The earthquake hastened development of western neighborhoods that survived the fire, including Pacific Heights , where many of the city's wealthy rebuilt their homes. In turn, the destroyed mansions of Nob Hill became grand hotels. City Hall rose again in the Beaux Arts style, and the city celebrated its rebirth at the Panama–Pacific International Exposition in 1915. During this period, San Francisco built some of its most important infrastructure. Civil Engineer Michael O'Shaughnessy

13462-509: The radiation originating from only one of the large SPEAR dipole (bending) magnets. Each one of those stations was equipped with a monochromator to select the radiation of interest, and experimenters would bring their samples and end stations from all over the world to study the unique effects only achieved through synchrotron radiation . The SLAC 2-mile linear accelerator was the original source for 3GeV electrons, but by 1991 SPEAR had its own 3-section linac and energy-ramping booster ring. Today,

13589-551: The rise of the beatnik and hippie countercultures, the sexual revolution , the peace movement growing from opposition to United States involvement in the Vietnam War , and other factors led to the Summer of Love and the gay rights movement, cementing San Francisco as a center of liberal activism in the United States . San Francisco and the surrounding San Francisco Bay Area are a global center of economic activity and

13716-542: The several thousands. More than half of the city's population of 400,000 was left homeless. Refugees settled temporarily in makeshift tent villages in Golden Gate Park, the Presidio, on the beaches, and elsewhere. Many fled permanently to the East Bay . Jack London is remembered for having famously eulogized the earthquake: "Not in history has a modern imperial city been so completely destroyed. San Francisco

13843-543: The southern side of the Golden Gate , which later came to be known as Fort Point. In 1804, the province of Alta California was created, which included San Francisco. At its peak in 1810–1820, the average population at the Mission Dolores settlement was about 1,100 people. In 1821, the Californias were ceded to Mexico by Spain. The extensive California mission system gradually lost its influence during

13970-487: The state's 18 original counties established at California statehood in 1850. Until 1856, San Francisco 's city limits extended west to Divisadero Street and Castro Street, and south to 20th Street. In 1856, the California state government divided the county. A straight line was then drawn across the tip of the San Francisco Peninsula just north of San Bruno Mountain . Everything south of the line became

14097-563: The strategic benefits of the area due to its large natural harbor, the Spanish dispatched Pedro Fages in 1770 to find a more direct route to the San Francisco Peninsula from Monterey , which would become part of the El Camino Real route. By 1774, Juan Bautista de Anza had arrived to the area to select the sites for a mission and presidio . The first European maritime presence in San Francisco Bay occurred on August 5, 1775, when

14224-493: The territory of San Francisco dates to 3000 BCE. The Yelamu group of the Ramaytush people resided in a few small villages when an overland Spanish exploration party arrived on November 2, 1769, the first documented European visit to San Francisco Bay . The Ohlone name for San Francisco was Ahwaste , meaning, "place at the bay." The arrival of Spanish colonists, and the implementation of their Mission system, marked

14351-642: The time, it was thickly forested with old-growth redwoods and he was alarmed when he learned they were scheduled to be logged. He petitioned the County Board of Supervisors to purchase the land instead. The Recreation Commission was not created until 1932, and the park was improved as part of the Works Progress Administration efforts starting in 1935. Prior to the rebuilding of the San Mateo Bridge that began in 1996,

14478-402: The underwater lot. By 1851, the harbor was extended out into the bay by wharves while buildings were erected on piles among the ships. By 1870, Yerba Buena Cove had been filled to create new land. Buried ships are occasionally exposed when foundations are dug for new buildings. California was quickly granted statehood in 1850, and the U.S. military built Fort Point at the Golden Gate and

14605-701: The vicinity of the Crystal Springs Reservoir . In May 2014, a California condor was spotted near Pescadero , a coastal community south of San Francisco —it was the first California condor spotted in San Mateo County since 1904. The condor, tagged with the number "597", and also known as "Lupine", is one of 439 condors living in the wild or captivity in California, Baja California and Arizona. The three-year-old female flew more than 100 miles (160 km) north from Pinnacles National Park , in San Benito County, on May 30, and landed on

14732-414: The western county include Frenchmans Creek , Pilarcitos Creek , Naples Creek , Arroyo de en Medio , and Denniston Creek . These streams originate along the northern spur of the Santa Cruz Mountains that run through the county. The northern and eastern parts of the county are very heavy densely populated with largely urban and suburban areas, with many of its cities as edge-cities for the Bay Area, while

14859-421: The wider region. San Francisco, which is Spanish for "Saint Francis," takes its name from Mission San Francisco de Asís , which in turn was named after Saint Francis of Assisi . The mission received its name in 1776, when it was founded by the Spanish under the leadership of Padre Francisco Palóu . The city has officially been known as San Francisco since 1847, when Washington Allon Bartlett , then serving as

14986-466: The world. listed by Beamline and Station 37°25′06.2″N 122°12′03.5″W  /  37.418389°N 122.200972°W  / 37.418389; -122.200972 San Mateo County, California San Mateo County ( / ˌ s æ n m ə ˈ t eɪ . oʊ / SAN mə- TAY -oh ), officially the County of San Mateo , is a county in the U.S. state of California . As of

15113-415: Was a major city known for its flamboyant style, stately hotels, ostentatious mansions on Nob Hill , and a thriving arts scene. The first North American plague epidemic was the San Francisco plague of 1900–1904 . At 5:12 am on April 18, 1906, a major earthquake struck San Francisco and northern California. As buildings collapsed from the shaking, ruptured gas lines ignited fires that spread across

15240-613: Was a major port of embarkation for naval service members shipping out to the Pacific Theater . In 1945, the United Nations Charter was signed in San Francisco, establishing the United Nations and in 1951, the Treaty of San Francisco re-established peaceful relations between Japan and the Allied Powers . After the war, the confluence of returning servicemen, significant immigration , liberalizing attitudes,

15367-500: Was also concern that a new town being planned by General Vallejo on the Carquinez Strait was to be called "Francisca", after the first name of his wife. After the name change to "San Francisco", the name of Vallejo's town was changed to Benicia , after his wife's middle name. Following the Treaty of Guadalupe Hidalgo in 1848, Alta California was ceded from Mexico to the United States . Despite its attractive location as

15494-662: Was at the height of the Great Depression that San Francisco undertook two great civil engineering projects, simultaneously constructing the San Francisco–Oakland Bay Bridge and the Golden Gate Bridge , completing them in 1936 and 1937, respectively. It was in this period that the island of Alcatraz , a former military stockade, began its service as a federal maximum security prison, housing notorious inmates such as Al Capone , and Robert Franklin Stroud ,

15621-464: Was centered on a plaza that is now Portsmouth Square . A land survey of Yerba Buena was made by the Swiss immigrant Jean Jacques Vioget as prelude to the city plan. Francisco de Haro , a non- Californio Mexican native, became the first alcalde of Yerba Buena. The second alcalde José Joaquín Estudillo was a Californio from a prominent Monterey family. In 1835, while in office, he approved

15748-536: Was drafted and signed in San Francisco in 1945 and, in 1951, the Treaty of San Francisco re-established peaceful relations between Japan and the Allied Powers . Urban planning projects in the 1950s and 1960s involved widespread destruction and redevelopment of west-side neighborhoods and the construction of new freeways , of which only a series of short segments were built before being halted by citizen-led opposition . The onset of containerization made San Francisco's small piers obsolete, and cargo activity moved to

15875-437: Was granted a small rancho at El Polín Spring , near the Presidio, founding the first non-indigenous civilian household in San Francisco. In 1834, the pueblo of Yerba Buena was founded. Yerba Buena Cove (named after a native herb ) was already a favored anchorage spot and the new settlement and trading post was founded by its shores. Yerba Buena was located in what is now the city's Chinatown and Financial District and

16002-837: Was hired by San Francisco Mayor James Rolph as chief engineer for the city in September 1912 to supervise the construction of the Twin Peaks Reservoir, the Stockton Street Tunnel , the Twin Peaks Tunnel , the San Francisco Municipal Railway , the Auxiliary Water Supply System , and new sewers. San Francisco's streetcar system, of which the J , K , L , M , and N lines survive today, was pushed to completion by O'Shaughnessy between 1915 and 1927. It

16129-410: Was the O'Shaughnessy Dam , Hetch Hetchy Reservoir , and Hetch Hetchy Aqueduct that would have the largest effect on San Francisco. An abundant water supply enabled San Francisco to develop into the city it has become today. In ensuing years, the city solidified its standing as a financial capital; in the wake of the 1929 stock market crash , not a single San Francisco-based bank failed. Indeed, it

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