Limousin (French pronunciation: [limuzɛ̃] ⓘ; Occitan: Lemosin [lemuˈzi]) is a former administrative region of southwest-central France.

Situated mostly in the west side of south-central French Massif Central, Limousin had (in 2010) 742,770 inhabitants[1] spread out on nearly 17,000 km2 (6,600 square miles), making it the least populated region of metropolitan France.

Forming part of the southwest of the country, Limousin was bordered by the regions of Centre-Val de Loire to the north, Auvergne to the east, Midi-Pyrénées to the south, Aquitaine to the southwest, and Poitou-Charentes to the west.

Between 1999 and 2004 the population of Limousin increased slightly, reversing a decline for the first time in decades.

There remained several different Occitan dialects in use in Limousin, although their use was rapidly declining.