Outer Islands of Mauritius (French: Îles éparses de Maurice) is the single first-order administrative division of the country and consists of the islands of Mauritius and several outlying islands. It is under the responsibility of the Ministry of Local Government and Outer Islands. The Constitution of Mauritius provides that the country includes the islands of Mauritius, Rodrigues, Agaléga, Saint Brandon (Cargados Carajos), Tromelin and the Chagos Archipelago, including Diego Garcia and any other island comprised in the State of Mauritius. The Government of Mauritius claim sovereignty over the Chagos Archipelago, which the United Kingdom split from its territories to create the British Indian Ocean Territory before its independence in 1965. Additionally, France shares a sovereignty claim over Tromelin, an uninhabited islet between Madagascar and Mauritius' main island.
The total land area of the country is 2040 km2 (excluding the Chagos Archipelago), that is the 169th largest nation in the world by size. Mauritian territory also incorporates the island of Rodrigues, which is situated some 560 kilometers to the east and is 104 km2 in area. Rodrigues used to be the country's tenth district, it gained autonomous status in 2002. The twin islands of Agaléga is situated some 1,000 km to the north of Mauritius, it has a total land area of 2,600 hectares. Saint Brandon is situated some 430 km to the north-east of Mauritius, it is an archipelago comprising a number of sand-banks, shoals and islets. Just off the Mauritian coast lie some 49 tiny uninhabited islands and islets (see Islets of Mauritius), some of them are used as natural reserves for the protection of endangered species.