San Francisco County, California
Founding: 1850 Parent counties: Unorganized territory Namesake: The city of San Francisco Seat: San Francisco (1850–) Land area: 232 square miles Population (2020): 873,965 Population (historic): 56,802 (1860); 233,959 (1880); 342,782 (1900); 634,394 (1930) Periods of population growth: pre-1860–1950; 1980–2020 Pre-1940 residences (estimated): 190,987 (47.6%) Pre-1940 housing survival rate: 77.8% Pre-1860 housing survival rate (1940): 2.3% Housing in disrepair (1950): 2.4% Average farmhouse value (1930): $1,531 Average outbuilding value (1930): $1,723 Number of farms (1920): 74 Average farm size (1920): 11.4 acres _________________________________________________________________________________ San Francisco Namesake: St. Francis of Assisi Founding: 1776 (founding); 1835 (platting); 1849 (post office); 1850 (incorporation) ___________________________...