Sonoma -- U.S. County in California Population (2000): 458614 Housing Units (2000): 183153 Land area (2000): 1575.878320 sq. miles (4081.505939 sq. km) Water area (2000): 192.347565 sq. miles (498.177886 sq. km) Total area (2000): 1768.225885 sq. miles (4579.683825 sq. km) Located within: California (CA), FIPS 06 Location: 38.440089 N, 122.768624 W Headwords: Sonoma Sonoma, CA Sonoma County Sonoma County, CA