[2] Its population is 105,280 (2021), and its area is 2,172.0 km2 (838.6 sq mi).

[3] The communes of the arrondissement of Montluçon, and their INSEE codes, are:[2] The arrondissement of Montluçon was created in 1800.

[4] At the January 2017 reorganization of the arrondissements of Allier, it lost 14 communes to the arrondissement of Vichy.

[2] As a result of the reorganisation of the cantons of France which came into effect in 2015, the borders of the cantons are no longer related to the borders of the arrondissements.

The cantons of the arrondissement of Montluçon were, as of January 2015:[6]