Fulton is a census-designated place (CDP) in Sonoma County, California, United States.

Fulton is just to the north of the city limits of Santa Rosa, and 7 miles (11 km) north-northeast of Sebastopol.

Fulton has a post office, established in 1871 and assigned ZIP code 95439.

[4] According to the United States Census Bureau, the CDP covers an area of 1.9 square miles (4.9 km2), all of it land.

This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F (22 °C).

There were 207 housing units at an average density of 106.2 per square mile (41.0/km2), of which 56.6% were owner-occupied and 43.4% were occupied by renters.