Tomales (formerly, Tomalles) is a census-designated place (CDP) on State Route 1 in Marin County, California, United States. The population was 204 at the 2010 census. The largest employer in Tomales is Tomales High School, which has a student body of approximately 250.
Tomales is located at 38°14′47″N 122°54′20″W / 38.24639°N 122.90556°W / 38.24639; -122.90556, above Keys Creek, about 3 mi (5 km) northeast of Tomales Bay. The nearest city is Petaluma, about 24 minutes away by automobile, and the nearest large city is San Francisco, about 75 minutes to the south.
The CDP has a total area of 0.33 sq mi (0.9 km2), all land.