Bay Point, formerly West Pittsburg, is a suburb and census-designated place located in eastern Contra Costa County, California, just west of the city of Pittsburg and northeast over Willow Pass from Concord. The population was 21,349 at the 2010 census, down from 21,534 reported at the 2000 census. It is the most populous CDP in Contra Costa County.
The Pittsburg-Bay Point terminal of the Bay Area Rapid Transit (BART) rail system is located here. The community is traversed by a freeway, State Route 4, the California Delta Highway.
Being unincorporated, Bay Point does not have its own police department. The community is policed by the California Highway Patrol and the Contra Costa County Sheriff’s Office.