West Bath is a town in Sagadahoc County, Maine, United States. The population was 1,910 at the 2020 census. A sub-locality of West Bath is Winnegance. West Bath is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area.

Sagadahoc County is a county located in the U.S. state of Maine. As of the 2020 census, the population was 36,699. Its county seat is Bath. In geographic area, it is the smallest county in Maine.