17°06′04″S 139°37′10″E / 17.101131°S 139.619398°E
Sweers Island is an island in the South Wellesley Islands in the Gulf of Carpentaria, Queensland, Australia. Most of the island is Aboriginal Freehold Land, held in trust by the Kaiadilt Aboriginal Land Trust (KALT) on behalf of the traditional owners. There is a small private resort, Sweers Island Resort owned via a perpetual lease on Crown Land, being the site of a township dating from the 1800s, with the only residents being the owners and workers at the resort.
Sweers Island was the location of "The Investigator Tree" which is now in Queensland Museum.