Cape St. George Island (also known as Little St. George Island) is an uninhabited barrier island situated on Florida's North Gulf Coast, south-southeast of St. Vincent Island, west of St. George Island and 8–10 miles south-southwest of the town of Apalachicola in Franklin County, Florida. It was formerly part of St. George Island, but was separated from the main island in 1954, when the U.S. Army Corps of Engineers constructed the ship channel known as Bob Sikes Cut.
Various Indian cultures occupied St. George Island for hundreds of years prior to the arrival of Europeans. Pottery fragments dating from A.D. 750 to 1450 occasionally are found on older portions of the island. Throughout the 1830s Apalachicola became Florida's largest port due to the booming cotton industry. With such a large volume of ships entering and leaving Apalachicola Bay a lighthouse was necessary. In 1831 the Florida Territorial Legislature was awarded an $11,800 Congressional appropriation to build a new lighthouse. The first lighthouse was constructed at the west end of the island in 1833 near West Pass, which was the main entrance to the bay. Due to the shape of St. George Island a second lighthouse was constructed at the southernmost tip to better guide ships. The second lighthouse only lasted three years due to poor construction and powerful storms. A replacement lighthouse was constructed in 1852 and stood over 500 yards inland from the Gulf. However, by 1990 beach erosion left the lighthouse vulnerable. The lighthouse finally succumbed to the weather when it toppled into the water July 10, 2005. A new replica of the Cape St. George lighthouse was finished December 1, 2006 on St. George Island.
Pine trees on Cape St. George Island were "catfaced" used to make turpentine from 1910 through 1916. During World War II the island served as a practice gunnery range for B-24 bombers stationed in nearby Apalachicola. From 1950 through 1956 the pine trees were again harvested for turpentine. The old buildings of the turpentine camp are still in existence at the Government Dock.