The Fort Branch Confederate Earthen Fort Civil War Site is a historic site in Oak City, North Carolina. It features the Civil War fort built by the Confederate Army along the Rainbow Banks in 1862.

Also known simply as the Fort Branch Civil War Site, the Fort Branch Confederate Earthen Fort Civil War Site is actually a well preserved star shaped earthen fort. It was constructed as a means of defense against the Union troops that could attack along the Roanoke River. It was also for preventing Union access to the Wilmington-Weldon Railroad Bridge.

Today, the Fort Branch Confederate Earthen Fort Civil War Site is open to the public. Visitors who might want to take a look at the venue can witness the annual battle reenactment held every November. Seven of the original 12 cannons are also on display on the site.