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 strongly reputed to be the landfall island of Columbus during his discovery of the New World in 1492.

Grand Turk is six miles long and just over a mile wide. Like the other islands, Grand Turk is blessed with miles of quiet sugary beaches and is close to several uninhabited cays just waiting to be explored. At the north point of the island, a channel to the sea gives access to North Creek, the only hurricane shelter for yachts traveling between Nassau and Puerto Rico.