Sonoma County is a county located in the U.S. state of California. As of the most recent data available, the county has a population of approximately 458,614 people, with a population density of about 291.00 persons per square mile.
The county spans a total land area of 1,576.00 square miles (4,082.00 square kilometers). The administrative center and county seat is Santa Rosa, which often serves as a hub for local governance and services. The largest city within the county by population is Santa Rosa.
Geographically, Sonoma County experiences varied elevations, with its highest point at Occidental 578 ft and its lowest point at Cloverdale 0 ft. The region operates in the UTC-8.