Rouergue (French: [ʁwɛʁɡ]; Occitan: [ruˈeɾɣe]) is a former province of France, corresponding roughly with the modern department of Aveyron. Its historical capital is Rodez. It is bounded on the north by Auvergne, on the south and southwest by Languedoc, on the east by Gévaudan and on the west by Quercy.
Rouergue became a department in 1790, and was renamed Aveyron after the principal river flowing through it. Upon creation of the department of Tarn-et-Garonne in 1808, the canton of Saint-Antonin-Noble-Val was detached from the western extremity of Aveyron and transferred to the new department.
The province of Rouergue had a land area of 9,007 km2 (3,478 sq mi). At the 1999 census there were 269,774 inhabitants on the territory of the province of Rouergue, for a density of only 30/km2 (78/sq mi). The largest urban areas are Rodez, with 38,458 inhabitants in 1999; Millau, with 22,840 inhabitants in 1999; Decazeville, with 17,044 inhabitants in 1999; and Villefranche-de-Rouergue, with 12,561 inhabitants in 1999.