page_title: History of San Francisco
section_title: 1848 gold rush
hierarchical_section_title: History of San Francisco / 1848 gold rush
caption_attribution_description: English: Execution of James P. Casey and Charles Cora by the Vigilance Committee, of San Francisco, California.
context_page_description: The history of the city of San Francisco, California, and its development as a center of maritime trade, were shaped by its location at the entrance to a large natural harbor. San Francisco is the name of both the city and the county; the two share the same boundaries. Only lightly settled by European-Americans at first, after becoming the base for the gold rush of 1849, the city quickly became the largest and most important population, commercial, naval, and financial center in the American West. San Francisco was devastated by a great earthquake and fire in 1906 but was quickly rebuilt. The San Francisco Federal Reserve Branch opened in 1914, and the city continued to develop as a major business city throughout the first half of the 20th century. Starting in the later half of the 1960s, San Francisco became the city most famous for the hippie movement. In recent decades, San Francisco has become an important center of finance and technology. The high demand for housing, driven by its proximity to Silicon Valley, and the low supply of available housing has led to the city being one of America's most expensive places to live.
context_section_description: The California gold rush starting in 1848 led to a large boom in population, including considerable immigration. Between January 1848 and December 1849, the population of San Francisco increased from 1,000 to 25,000. The rapid growth continued through the 1850s and under the influence of the 1859 Comstock Lode silver discovery. This rapid growth complicated city planning efforts, leaving a legacy of narrow streets that continues to characterize the city to this day.
  The population boom included many workers from China who came to work in the gold mines and later on the Transcontinental Railroad. The Chinatown district of the city became and is still one of the largest in the country; today, as a result of that legacy, the city as a whole is roughly one-fifth Chinese, one of the largest concentrations outside of China. Many businesses founded to service the growing population exist today, notably Levi Strauss & Co. clothing, Ghirardelli chocolate, and Wells Fargo bank. Many famous railroad, banking, and mining tycoons or "robber barons" such as Charles Crocker, Mark Hopkins, Collis P. Huntington, and Leland Stanford settled in the city in its Nob Hill neighborhood. The sites of their mansions are now famous and expensive San Francisco hotels (Mark Hopkins Hotel and the Huntington Hotel).
  As in many mining towns, the social climate in early San Francisco was chaotic. Committees of Vigilance were formed in 1851, and again in 1856, in response to crime and government corruption. This popular militia movement lynched 12 people, kidnapped hundreds of Irishmen and government militia members, and forced several elected officials to resign. The Committee of Vigilance relinquished power both times after it decided the city had been "cleaned up." This mob activity later focused on Chinese immigrants, creating many race riots. These riots culminated in the creation of the Chinese Exclusion Act in 1882 that aimed to reduce Chinese immigration to the United States by limiting immigration to males and reducing numbers of immigrants allowed in the city. The law was not repealed until 1943 with the Magnuson Act.
  San Francisco was the county seat of San Francisco County, one of state's 18 original counties since California's statehood in 1850. Until 1856, the city limits extended west to Divisadero Street and Castro Street, and south to 20th Street. In response to the lawlessness and vigilantism that escalated rapidly between 1855 and 1856, the California government decided to divide 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 San Mateo County while everything north of the line became the new consolidated City and County of San Francisco, to date the only consolidated city-county in California.
  In autumn of 1855, a ship bearing refugees from an ongoing cholera epidemic in the Far East (authorities disagree as to whether this was the S.S. Sam or the S.S. Carolina but primary documents indicate that the Carolina was involved in the epidemic of 1850 and the SS Uncle Sam in the epidemic of 1855) docked in San Francisco. Since the city's rapid Gold Rush population growth had significantly outstripped the development of infrastructure, including sanitation, a serious cholera epidemic quickly broke out. The responsibility for caring for the indigent sick had previously rested on the state, but faced with the San Francisco cholera epidemic, the state legislature devolved this responsibility to the counties, setting the precedent for California's system of county hospitals for the poor still in effect today. The Sisters of Mercy were contracted to run San Francisco's first county hospital, the State Marine and County Hospital, due to their efficiency in handling the cholera epidemic of 1855. By 1857, the order opened St. Mary's Hospital on Stockton Street, the first Catholic hospital west of the Rocky Mountains. In 1905, The Sisters of Mercy purchased a lot at Fulton and Stanyan Streets, the current location of St. Mary's Medical Cent
caption: Charles Cora and James Casey are lynched by the Committee of Vigilance, 1856.
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