Fort Barry is a former United States Army installation on the West Coast of the United States, located in the Marin Headlands of Marin County, California, north of San Francisco. Opened 116 years ago in 1908, the fort was part of the Coast Artillery Corps and operated throughout the 20th century, before its closure and eventual transfer to the National Park Service.

Fort Baker is one of the components of California's Golden Gate National Recreation Area. The Fort, which borders the City of Sausalito in Marin County and is connected to San Francisco by the Golden Gate Bridge, served as an Army post until the mid-1990s, when the headquarters of the 91st Division moved to Parks Reserve Forces Training Area. It is located opposite Fort Point at the entrance to the San Francisco Bay.