Grand Turk Island, or Turk's Island in the History of Mary Prince, is an island in the Turks and Caicos Islands, a British overseas territory near the Bahamas. Grand Turk Island is the largest island in the smaller Turks islands archipelago, and it is the cultural, administrative, financial, and historic center of the territory. The island was under the control of various European powers before eventually settling under the British Empire.

It is mentioned several times in the History of Mary Prince, and life there is described as hellish by Prince due to the poor conditions, poor treatment by her master, and the backbreaking work of processing sea salt, then a major export product of the territories.