Woodacre is an unincorporated town and census-designated place located in the San Geronimo Valley in Marin County, California. Woodacre is located 8 miles south-southwest of Novato, and 8 miles northwest of San Rafael; the nearest incorporated town is Fairfax, 4 miles east-southeast. At 364 feet, Woodacre has the highest base elevation in Marin County. The population was 1,348 at the 2010 census.