Le Mayet-de-Montagne (French pronunciation: [lə majɛ də mɔ̃taɲ]; Occitan: Lo Maiet de Montanha) is a commune in the Allier department in central France.

Le Mayet-de-Montagne is situated 16.6 miles south of Vichy in the north part of the Massif Central.

In 1334, le Mayet de Montagne belonged to Auvergne.

The counts of Auvergne considered Le Mayet to be of great strategic value, and they held onto the town until 1589, when Henri IV decided to alter the borders of Bourbonnais to include Le Mayet.

Le Mayet was the chef-lieu of its eponymous canton until 2015.