Sonoma County History & Genealogy Library

Sonoma County History & Genealogy Library Sonoma County History & Genealogy Library In October 1994, the collection relocated to a building adjacent to the library at 725 3rd Street.

Located in downtown Santa Rosa, the History & Genealogy Library serves Sonoma County residents and visiting researchers with reference, archival, and digital collections on county and regional history and culture, as well as resources for family history research. The History & Genealogy Library started in 1967 as the “Sonoma County Room” on the upper floor of the Central Santa Rosa Library. Since

that time, the library has steadily expanded its collections and staff to meet the needs of our growing, changing community.

Aftermath of California Creamery fire, Baker Street and Western Avenue, Petaluma, California, August 20, 1975
09/04/2026

Aftermath of California Creamery fire, Baker Street and Western Avenue, Petaluma, California, August 20, 1975

African Odyssey show at the Hall Flowers at the Sonoma County Fair, Santa Rosa, California, 2003
08/28/2026

African Odyssey show at the Hall Flowers at the Sonoma County Fair, Santa Rosa, California, 2003

Advertisement for Sonoma County Fair and Egg Day, August 15-19, 1923
08/22/2026

Advertisement for Sonoma County Fair and Egg Day, August 15-19, 1923

Apple Blossom Queen, Jennifer Langeberg, at the Gravenstein Apple Fair in Ragle Ranch Regional Park, Aug. 6, 1979
08/06/2026

Apple Blossom Queen, Jennifer Langeberg, at the Gravenstein Apple Fair in Ragle Ranch Regional Park, Aug. 6, 1979

Woman and a girl stand by a water pump, circa 1915.Courtesy of Western Sonoma County Historical Society and the Thomas &...
07/31/2026

Woman and a girl stand by a water pump, circa 1915.

Courtesy of Western Sonoma County Historical Society and the Thomas & Margaret Sebring Family Collection, all photographs available on digital.sonomalibrary.org.

29th anniversary sale at Mode O'Day dress shop at 158 North Main in Sebastopol, California, 1961
07/24/2026

29th anniversary sale at Mode O'Day dress shop at 158 North Main in Sebastopol, California, 1961

07/22/2026

Join us this Saturday at the Rohnert Park Cotati History Day at Rohnert Park-Cotati Regional Library!

10-11am: Open House
11am - 12pm: Cotati presentation
12-1pm: Rohnert Park Presentation
1-1:15pm: Sonoma County Library History & Genealogy Presentation
1:15-2pm: Trivia!

07/17/2026

My town--Petaluma" by James F. Kutz, performed by Gary Foster for a 1970 contest judged by Bill Soberanes.

Photos:
1868 map of Petaluma, California and the Petaluma and Haystack Railroad line
Petaluma Music Center, circa 1950
Petaluma Engine Company No. 1, 1910
Pepper Kindergarten, Petaluma, Cal., circa 1905
Celebrating the fiftieth anniversary of the Petaluma Typographical Union, Petaluma, California, 1963

Address

725 Third Street
Santa Rosa, CA
95404

Opening Hours

Tuesday 11am - 5pm
Wednesday 11am - 5pm
Thursday 11am - 5pm
Friday 11am - 5pm
Saturday 11am - 5pm

Telephone

+17073083212

Website

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