Fort Popham is a coastal efense land battery at the mouth of the Kennebec River in Phippsburg, Maine, United States. It is located in sight of the short-lived Popham Colony and, like the colony, named for George Popham, the colony's leader. During the American Revolution a minor fortification stood on this site; in 1808 the federal government built a small battery derisively known as an "embargo fort" on this location as part of the second system of fortifications that guarded the coast. It remained manned until 1815, and saw minor action during the War of 1812.