Annapolis is an unincorporated community in Sonoma County, California, United States. Annapolis is situated near the coastline of northern Sonoma County, and is 5 miles (8.0 km) north-northeast of the nearest community, Stewarts Point. Annapolis has ZIP code 95412. The community is named after Annapolis Orchards, which was founded in the area in the 1880s. As of 2010, Annapolis has about 401 residents.
This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Annapolis has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.