Fort Jesup, Military fort in Sabine Parish, Louisiana, United States.

Fort Jesup was a military post at the western boundary of Louisiana with various buildings supporting garrison operations. The site includes restored and reconstructed structures showing early 1800s camp life.

The fort was established in 1822 to control the border region between US and Spanish territories. It played an important role during North American expansion in the following decades.

The fort's name comes from Colonel Zachary Taylor's cantonment, and the site is now a state historic site where the reconstructed officer's quarters serves as a museum. The restored kitchen of Enlisted Barracks 4, furnished with period pieces, is the only surviving original building. The nearby town of Many raised money in the 1930s to save it.

The site is on Louisiana Highway 6, seven miles (11 km) northeast of Many. The kitchen of Enlisted Barracks 4 and the reconstructed officer's quarters, now a museum, can be visited. The grounds are open to the public; allow time to walk between the buildings.

The garrison witnessed major territorial changes as Texas shifted from Spanish control to independence and then to statehood. This transformation played out literally at the borders the post monitored.