Allanche (French pronunciation: [alɑ̃ʃ]; Occitan: Alancha) is a commune in the Cantal department in the Auvergne region of south-central France.

It can be accessed by the D679 from Marcenat in the northwest to the village then south to Sainte-Anastasie.

The D9 road branches off the D3 to the west of the commune and passes through the village continuing to the northeast.

List of Successive Mayors[4] The inhabitants of the commune are known as Allanchois or Allanchoises in French.

[5] The commune has two religious buildings and structures that are registered as historical monuments: