Fort St. Louis (Shelburne County, Nova Scotia)

Not to be confused with Fort St. Louis (Guysborough County, Nova Scotia)

Fort Saint Louis was a fort built by the French Empire in 1623 in its colony of Acadia. During the Scottish occupation of Port Royal from 1629 to 1632, this fort was France's only foothold in Acadia. The British were unsuccessful in their attempts to capture the fort, and France regained Acadia in 1632. The archaeological remains of the former fort are located in what is today Nova Scotia, Canada.

The site of Fort St Louis was designated a National Historic Site of Canada in 1931. The Historic Sites and Monuments Board of Canada placed a cairn and plaque commemorating the fort at a site in Port La Tour, Nova Scotia, although some argue that the fort was actually located in nearby Villagedale, Nova Scotia.