Woodacre is an unincorporated town and census-designated place (CDP) located in the San Geronimo Valley in Marin County, California. Woodacre is located 8 miles (13 km) south-southwest of Novato, and 8 miles northwest of San Rafael; the nearest incorporated town is Fairfax, 4 miles east-southeast. At 364 feet (111 m), Woodacre has the highest base elevation in Marin County.