South Uist (Scottish Gaelic: Uibhist a Deas) is an island of the Outer Hebrides in Scotland. In the 2001 census it had a usually resident population of 1,818. There is a nature reserve and a number of sites of archaeological interest, including the only location in Great Britain where prehistoric mummies have been found. The population is about 90% Roman Catholic. The island, in common with the rest of the Hebrides, is one of the last remaining strongholds of the Gaelic language in Scotland. In 2006 South Uist, and neighbouring Benbecula and Eriskay were involved in Scotland's biggest community land buyout to date. In the north west there is a missile testing range.