Great Island (disambiguation)

Great Island is an island within Cork Harbour in Ireland.

Great Island may also refer to:
 * Great Island (Newfoundland and Labrador), an island in Canada
 * Great Island, Falkland Islands
 * "The Great Island" another name for Madagascar
 * Great Island (New Zealand), an island in Fiordland, New Zealand
 * Manawatāwhi / Great Island, an island in the Three Kings Islands group of New Zealand
 * Great Island or King's Island, an island of Enfield, Connecticut
 * Great Island (Massachusetts), an island of Massachusetts