Sonoma County is in Northern California. It's known for the Sonoma Valley wine region, as well as other notable winemaking areas such as the Dry Creek and Alexander valleys. The city of Sonoma is home to the 19th-century Mission San Francisco...
Cities: Sonoma, Santa Rosa, Petaluma, and more
Population: 482,650 (2022)
Area code: 707
Congressional districts: 2nd, 4th
County seat (and largest city): Santa Rosa
Highest elevation: 4,483 ft (1,366 m)
Named for: the city of Sonoma