Grand Turk Island is an island in the Turks and Caicos Islands. It is the largest island in the Turks Islands (not the Caicos). It contains the territory's capital, Cockburn Town. The island is the administrative, historic, cultural and financial center of the country, and has the second largest population of the islands at approximately 3,720 people.

It is said to be the landfall island of Columbus during his discovery of the New World in 1492.