Sonoma County, located on the northern coast of the U.S. state of California, is the largest (in area) and northernmost of the nine San Francisco Bay Area counties.
Sonoma is a historically significant city inSonoma Valley,Sonoma County, California, United States, surrounding its historic town plaza, a remnant of the town's Mexicancolonialpast. Today, Sonoma is a center ofthe state's wine industryfor the Sonoma Valley AVAAppellation, as well as the home of theSonoma International Film Festival. Sonoma's population was 10,648 as of the 2010census, while the Sonoma urban area had a population of 32,678.