California Historical Societies

This directory lists 62 historical societies, museums, and archives in California, ranging from large regional institutions such as the Oakland Museum of California and the Autry Museum of the American West to county collections like the Kern County Museum in Bakersfield and community groups such as the Chinese Historical Society of America. Use the cards below to find the organization closest to the town you are researching, then use the guide that follows to locate the records themselves.

California became the thirty-first state on September 9, 1850, and today has 58 counties, so most county record series start in the 1850s while anything earlier was created under Spanish (1769-1821) or Mexican (1822-1846) administration. Two facts shape almost every California search: statewide birth and death registration did not begin until July 1905, and the April 1906 San Francisco earthquake and fire destroyed that city's pre-1906 civil records along with part of the Spanish and Mexican land archives. Plan to work around both gaps with county, church, voter, and land sources.

Featured Historical Societies

Major repositories for California research

Start with four institutions, each with a different strength.

• California State Archives, 1020 O Street, Sacramento (part of the Secretary of State). Research room open Monday to Friday, 9:30 a.m. to 4:00 p.m. Holdings most useful to family and property researchers: the 1852 state census filed by county; county records from 28 counties (1850-1987) including probate case files, wills, naturalizations, deeds and homesteads; San Quentin and Folsom prison registers with name indexes 1850-1979; militia and military records 1850-1942; state hospital patient registers 1856-1934; and professional licensing files 1885-1968. Search the Minerva catalog before you visit. sos.ca.gov/archives
• California State Library. The California History Section in Sacramento holds state newspapers on microfilm, maps and photographs. Its San Francisco branch, the Sutro Library (1630 Holloway Avenue, 5th floor, on the San Francisco State University campus), is the largest genealogical library west of Salt Lake City, with census microfilm, family and county histories, city and telephone directories, and church and government vital record transcriptions from across the United States. Open Tuesday to Thursday, 10 a.m. to 4 p.m., no appointment needed. library.ca.gov/sutro
• California Historical Society Collection at Stanford. The California Historical Society closed permanently in 2024-2025 and transferred its roughly 600,000-item collection (Gold Rush, statehood, and 1906 earthquake material, photographs, manuscripts) to Stanford University Libraries, where it is now accessible to the public under that name. Do not travel to the old San Francisco address. library.stanford.edu
• The Bancroft Library, University of California, Berkeley. The main special collections library for Western Americana, and the single most important stop for rancho research: it holds the land case files for both federal judicial districts in California. Material is non-circulating and is paged to the Heller Reading Room through the Aeon request system. lib.berkeley.edu/visit/bancroft

Birth, death, marriage, and divorce records

Statewide registration of births and deaths began in July 1905, and compliance was general by about 1920. The California Department of Public Health, Vital Records office in Sacramento holds birth and death certificates from July 1905 forward; certified copies require a notarized sworn statement, while informational copies do not. CDPH Vital Records

• Before 1905: go to the County Recorder. Some counties recorded births and deaths decades before the state did, and county copies often survive where state copies are missing. For a death between 1905 and 1997, search the California Death Index first (1905-1939 and 1940-1997 segments are free on FamilySearch) to get the county and exact date.
• Marriages: a 1850 law required counties to record marriages, so the county clerk and recorder hold them from the county's formation. The state did not begin collecting marriage records until 1905.
• Divorces: the case file is in the Superior Court of the county where the divorce was granted. The state has kept only an index of divorces since 1962, not the decrees.
• Substitutes for the 1905 gap: county Great Registers of voters, kept from 1866, list each registered man's age, birthplace, occupation, residence and naturalization details, and are the best year-by-year tracking tool for California men between the 1860s and 1910s.

Land, deed, and property records

California is a public-land state with a Spanish and Mexican layer underneath. Land was granted by Spain from 1769 to 1821 and by Mexico from 1822 to 1846. After the Mexican-American War, Congress created the Board of Land Commissioners in 1851 to test every private claim; in five years it accepted 813 claims and confirmed 514, and after federal court appeals 582 ranchos eventually received United States patents.

• Rancho and land-grant case files: the Bancroft Library at UC Berkeley holds the land case files for both federal districts, including diseños (hand-drawn boundary maps) and testimony. Some of the original Spanish and Mexican archives were destroyed in the 1906 San Francisco fire, so the Bancroft copies and the National Archives case files are often the only surviving record.
• Federal patents and homesteads: search the Bureau of Land Management General Land Office Records for the first transfer from the United States to a private owner, plus survey plats and field notes. glorecords.blm.gov
• Every later transfer: deeds, mortgages, homestead declarations and subdivision maps are recorded by the County Recorder (in a few counties the office is titled Clerk-Recorder). Grantor and grantee indexes run from the county's formation. The State Archives also holds deeds and homesteads for 28 counties within its county records series.

Newspapers and city directories

California has one of the deepest free newspaper archives in the country. The California Digital Newspaper Collection (CDNC), run by the Center for Bibliographical Studies and Research at UC Riverside, covers 1846 to the present and in 2025 held more than 1.5 million issues and 23 million pages, including the first California newspaper, the Californian, and the Daily Alta California. It is keyword searchable at no charge. cdnc.ucr.edu

• Chronicling America (Library of Congress) carries additional California titles digitized through the National Digital Newspaper Program; check both sites, because the title lists differ.
• Microfilm: the California State Library holds the most extensive run of California newspapers on microfilm, useful for titles not yet digitized.
• City directories: the Sutro Library and the California History Section both hold long runs of California city and telephone directories, and most county libraries keep their own town's run. Directories are the fastest way to confirm an address year by year between censuses; see how to use old city directories.

Census, military, and statewide indexes

• Census: California took only one state census, in 1852; the originals are at the State Archives (filed by county) and it is indexed on FamilySearch and Ancestry. Federal population schedules exist for every decade from 1850 through 1950. For the Spanish and Mexican periods, padrones (local census lists) survive for communities such as Los Angeles, Monterey and Santa Barbara between 1788 and 1844.
• Military: the State Archives holds organization papers and muster rolls for independent militia units, the Indian Wars, Civil War, Spanish-American War, and both World Wars (1850-1942), with name indexes.
• Institutional and court records: San Quentin and Folsom registers with inmate photographs (1850-1979), state hospital registers (1856-1934), and Supreme and Appellate Court case files with plaintiff and defendant indexes through 1930, all at the State Archives.
• Death index: the California Death Index 1905-1939 gives name, date, county and age; the 1940-1997 index adds birth date, birthplace and mother's maiden name.

Researching a house or building in California

The state historic preservation office is the California Office of Historic Preservation (OHP), a unit of California State Parks. It administers the National Register of Historic Places and the California Register of Historical Resources in the state, as well as the California Historical Landmarks program (more than 1,060 numbered landmarks) and California Points of Historical Interest. Survey records and site files are managed through the California Historical Resources Information System (CHRIS) and its regional information centers. ohp.parks.ca.gov

• Begin with the deed chain at the County Recorder, working backward from the current owner; our guide to tracing a property deed history walks through grantor-grantee indexes.
• Date the structure with assessor records, building permits (city or county), and Sanborn fire insurance maps. The Library of Congress has digitized its Sanborn maps for California cities, and the State Library and many county libraries hold the rest on microfilm. See when was my house built.
• If the property predates 1850, check whether it sits inside a confirmed rancho; the land case file will contain the earliest survey and ownership testimony. For commercial buildings, follow researching an old building.

Working with California historical societies

California local history is organized mainly by county and by city rather than by township. County museums such as the San Bernardino County Museum and the Sutter County Museum usually hold the county-wide photograph and manuscript collections, while city groups like the Escondido History Center or the Richmond Museum of History are strongest on a single town's businesses, schools and families. Many volunteer-run societies open their research rooms only one or two days a week, so email before driving, and ask specifically whether they hold an obituary index, a photograph index, or local city directories. Ethnic-heritage societies, including the two Chinese historical societies listed here, maintain name indexes and oral histories that do not appear in county collections.

Additional California History Resources

• California State Archives - State archives in Sacramento: 1852 census, county records, prison, military and licensing files
• California State Archives family history resources - List of genealogy-relevant record groups with date ranges
• CDPH Vital Records - Order California birth and death certificates from July 1905 onward
• Sutro Library (California State Library) - Genealogy branch of the State Library at San Francisco State University
• California Digital Newspaper Collection - Free searchable California newspapers, 1846 to present
• California Office of Historic Preservation - SHPO: National and California Registers, Historical Landmarks, CHRIS
• The Bancroft Library, UC Berkeley - Western Americana and Spanish/Mexican land case files
• BLM General Land Office Records - Federal land patents, survey plats and field notes
• FamilySearch Wiki: California Vital Records - Record availability by type and county

Frequently Asked Questions

When did California start keeping birth and death records?

Statewide registration began in July 1905 and was generally complied with by 1920. The California Department of Public Health holds certificates from July 1905 forward; for anything earlier, contact the County Recorder, since several counties recorded births and deaths well before the state did.

Were San Francisco records really destroyed in 1906?

Yes. The April 1906 earthquake and fire destroyed the city's pre-1906 vital records and property records, along with part of the Spanish and Mexican land archives. Work around the loss with church registers, Great Registers of voters, the 1852 state census, city directories, and the land case file copies held by the Bancroft Library.

Where can I search old California newspapers for free?

The California Digital Newspaper Collection at UC Riverside (cdnc.ucr.edu) covers 1846 to the present with more than 23 million pages and is free and keyword searchable. Chronicling America at the Library of Congress carries additional California titles, and the California State Library holds the rest on microfilm.

How do I find out whether my property was part of a Spanish or Mexican rancho?

Check the 1851 Board of Land Commissioners case files, which were reviewed for 813 claims; the Bancroft Library at UC Berkeley holds the case files for both federal districts, including the hand-drawn diseno maps. Then trace later transfers through the County Recorder's grantor-grantee indexes.