Corse-du-Sud (French pronunciation: [kɔʁs.dy.syd]; Corsican: Corsica suttana) (English: South Corsica) is a French département composed of the southern part of the island of Corsica.

The department was formed on 15 September 1975, when the corsican department was divided into Haute-Corse and Corse-du-Sud. Its boundaries correspond to the former department of Liamone, which existed from 1793 to 1811.

The department hit the head-lines at the end of the twentieth century with the assassination at Ajaccio of the prefect Claude Érignac on 6 February 1998.

The department is surrounded on three sides by the Mediterranean Sea and on the north by the department of Haute-Corse.

The entire island of Corsica is mountainous with many beautiful beaches.

The inhabitants of all of Corsica are called Corsicans.

Corsicans are a fiercely independent people. However, a 6 July 2003 referendum on increased autonomy was voted down by a very thin majority: 50.98 percent against to 49.02 percent for. This was a major setback for French Minister of the Interior Nicolas Sarkozy, who had hoped to use Corsica as the first step in his decentralization policies.