Cotton Cay is found 1.6 miles (2.6 km) northeast of Salt Cay and 3.6 miles (5.8 km) south of Grand Turk, and is an uninhabited 0.43 square mile (1.12 sq km) island.
The cay is generally of low-elevation and has the low density coastal vegetation typical to the Turks and Caicos. Snorkeling can be found in the waters around the island.
Much of the coastline of Cotton Cay is rocky, although a small 600-foot (180 m) scenic beach can be found on the west side of the island.
Cotton, and later on sisal, were raised here and plantation ruins and field walls can be seen on the western half of the island. Uncommon on the main islands in the country, Turk’s Head cactuses are well-established on Cotton Cay.