Fairfax is an incorporated town in Marin County, California, United States. Fairfax is located 3.25 miles west-northwest of San Rafael, at an elevation of 115 feet. When purchasing homes for sale in Fairfax, you’re also purchasing a history. There’s still a whiff of 60s counter-culture in Fairfax. If Fairfax feels like it is living in a time warp, that’s just fine with its residents who have passed ordinances prohibiting chain stores, plastic bags, and Styrofoam takeout food packaging.