Le Donjon is a former canton of the Allier department, Auvergne, France.

It was disbanded following the French canton reorganisation which came into effect in March 2015.

It consisted of 13 communes,[1] which joined the canton of Dompierre-sur-Besbre in 2015.

[1] The canton consisted of the following communes:[1]

This Allier geographical article is a stub.