Incorporated in 1900, Mill Valley is located about 14 miles north of San Francisco via the Golden Gate Bridge. In the 2020 census, the population was 14,231. Nestled along the eastern slopes of Mount Tamalpais, Mill Valley has a mountain town vibe with a thriving downtown. The Mill Valley zip code, 94941, includes adjacent unincorporated communities of Almonte, Alto, Homestead Valley, Tamalpais Valley and Strawberry.