Fort Mitchel is an American Civil War fortification at 65 Skull Creek Drive in Hilton Head, South Carolina. It was built in 1861 by Union Army forces as part of the defenses of a coaling station and ship maintenance facility at Seabrook Landing. It was named for Brigadier General Ormsby M. Mitchel and is a rare surviving example of a semi-permanent fortification built by the Union in the South Carolina Low Country. The fort site was listed on the National Register of Historic Places in 2017. Today, it is a historic site that is open to the public.