南尤伊斯特岛是苏格兰外赫布里底群岛中的一个岛屿。2001年人口普查时，岛上居民有1818人。岛上有一个自然抱去和许多考古遗址，全英国唯一的史前木乃伊就发掘于该岛。90%人口是天主教徒。

岛的西部是沿海沙质低地，东海岸则多山，包括620米的Beinn Mhòr和606米的Hecla。岛上主要的村落是Lochboisdale。

South Uist (Scottish Gaelic:Uibhist a Deas) is an island of the Outer Hebrides in Scotland. In the 2011 census it had a usually resident population of 1,754, a fall of****since 2001. 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. Its inhabitants are known in Gaelic as "Deasaich" (Southerners).