Mauritius (môrish'ēus, –us) [key], officially Republic of Mauritius, republic (2005 est. pop. 1,231,000), 790 sq mi (2,046 sq km), in the SW Indian Ocean. It is part of the Mascarene Islands, c.500 mi (800 km) E of Madagascar. The island of Rodriguez and two groups of small islands, Agalega and Cargados Carajos, are dependencies of Mauritius. The capital is Port Louis.