Sonoma County is a county in the U.S. state of California. As of the 2020 United States Census, its population was 488,863. Its county seat and largest city is Santa Rosa. It is to the north of Marin County and the south of Mendocino County. It is west of Napa County and Lake County.
Sonoma County includes the Santa Rosa-Petaluma Metropolitan Statistical Area, which is part of the San Jose-San Francisco-Oakland, CA Combined Statistical Area. It is the northernmost county in the nine-county San Francisco Bay Area region.
Wikipedia https://en.wikipedia.org/wiki/Sonoma_County,_California
Coordinates 38°26'25.773" N -122°42'50.778" E
