In 1800, the arrondissements of Rodez, Espalion, Millau, Saint-Affrique and Villefranche-de-Rouergue were established. The arrondissements of Espalion and Saint-Affrique were disbanded in 1926.[2]
The borders of the arrondissements of Aveyron were modified in January 2017:[3]
six communes from the arrondissement of Millau to the arrondissement of Rodez
19 communes from the arrondissement of Rodez to the arrondissement of Millau
34 communes from the arrondissement of Rodez to the arrondissement of Villefranche-de-Rouergue