Graton is an unincorporated town and census-designated place (CDP) in west Sonoma County, California, United States. The population was 1,707 at the 2010 census. Graton's ZIP code is 95444.
Graton is located at 38°26′15″N 122°51′59″W / 38.437613°N 122.866375°W / 38.437613; -122.866375. The CDP has a total area of 1.58 sq mi (4.1 km2), all land.
Graton is located at the southeastern end of Green Valley, on the east bank of the seasonally flooding Atascadero Creek. The elevation ranges from approximately 85 feet (26 m) above Mean Sea Level (MSL) at Atascadero Creek to 213 feet (65 m) MSL at Oak Grove School.