Pearson Island is an island located in South Australia within the Pearson Isles an island group located in the larger group known as the Investigator Group about 63 kilometres (39 mi) southwest by west of Cape Finniss on the west coast of Eyre Peninsula. The group was discovered and named by Matthew Flinders on 13 February 1802. The island group has enjoyed protected area status since the 1960s and since 2011, it been part of the Investigator Group Wilderness Protection Area.