Occidental is a census-designated place in Sonoma County, California, United States. The population was 1,132 at the 2020 census, up from 1,115 at the 2010 census. Founded in 1876, Occidental was a stop on the North Pacific Coast Railroad connecting Cazadero to the Sausalito ferry. In return for donating right-of-way to the railroad, a local landowner nam…Occidental is a census-designated place in Sonoma County, California, United States. The population was 1,132 at the 2020 census, up from 1,115 at the 2010 census. Founded in 1876, Occidental was a stop on the North Pacific Coast Railroad connecting Cazadero to the Sausalito ferry. In return for donating right-of-way to the railroad, a local landowner named "Dutch Bill" Howards received a lifetime railway pass, and the station was named after him.