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 with ZIP code 95439, which was established in 1871. The community is named after Thomas and James Fulton, who founded the community. The population as of the 2010 U.S. Census was 541.
According to the United States Census Bureau, the CDP covers an area of 1.9 square miles (5.0 km²), all of it land.
The 2010 United States Census reported that Fulton had a population of 541. The population density was 277.6 people per square mile (107.2/km²). The racial makeup of Fulton was 349 (64.5%) White, 3 (0.6%) African American, 12 (2.2%) Native American, 11 (2.0%) Asian, 1 (0.2%) Pacific Islander, 149 (27.5%) from other races, and 16 (3.0%) from two or more races. Hispanic or Latino of any race were 186 persons (34.4%).