South Molle Island, part of the Whitsunday Islands, is a resort island in the Whitsunday section of the Great Barrier Reef Marine Park in Australia. The hilly island has numerous bays and inlets accessible by 16 km of walking and cycling tracks, with most protected in the Molle Islands National Park.
The islands were named by Lieutenant Charles Jefferys in 1815 after Colonel George James Molle, the then Lieutenant Governor of New South Wales. Nearby islands include Mid Molle, North Molle and West Molle. Just to the east and southeast, respectively, are the small islands Planton and Denman. Wild goats were introduced to the island in the nineteenth century as a food source for shipwrecked sailors.