Santa Rosa is the county seat of Sonoma County, California United States. The 2012 census reported a population of 170,685. Santa Rosa is the largest city in California’s North Coast, Wine Country and the North Bay; the fifth most populous city in the San Francisco Bay Area after San Jose, San Francisco, Oakland, and Fremont; and the 26th most populous city in California.
County: Sonoma
City: Santa Rosa
State: California
Zip Code: 95404