The arrondissement of Ancenis is a former arrondissement of France in the Loire-Atlantique department in the Pays de la Loire region.

In January 2017 it was merged into the new arrondissement of Châteaubriant-Ancenis.

[2] The communes of the arrondissement of Ancenis, and their INSEE codes, were:[1] The arrondissement of Ancenis was created in 1800, disbanded in 1926 and restored in 1943.

[1] 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 Ancenis were, as of January 2015:[2]