Located at , Sausalito encompasses both steep, wooded hillside and shoreline tidal flats. According to the United States Census Bureau, the city has a total area of . Notably, only of it is land. A full 21.54% of the city (0.5 square miles, or 1.3 km2) is under water, and has been so since its founding in 1868. Prominent geographic features associated with Sausalito include Richardson Bay and Pine Point.
