County Of SonomaSanta Rosa, CA
AboutSonoma 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 Solano and the central, colonial-era Sonoma Plaza. Near Glen Ellen, Jack London State Historic Park contains the gravesite and cottage of the American author, plus many trails.