Ambert (French pronunciation: [ɑ̃bɛʁ] ^ⓘ; Auvergnat: Embèrt) is a commune in the Puy-de-Dôme department in Auvergne in central France.

Ambert is the seat of the canton of Ambert and the arrondissement of Ambert. It is a sub-prefecture of the department. The arrondissement consists of eight cantons (before March 2015).

Ambert is located in the southeast of the Puy-de-Dôme department, in the Auvergne-Rhône-Alpes region.

The commune lies on the river Dore, a tributary of the Allier.

Ambert is famous for its fourme d'Ambert cheese - "Fourme d'Ambert", its paper mills - "Le moulin Richard de Bas" - (the first edition of Diderot's Encyclopédie was printed on paper made in Ambert) and its circular town market hall - "La Mairie" - (popularized by Jules Romains in his novel Les copains).

The Agrivap Chemin de Fer Touristique operates out of Ambert. There is a steam engine that makes a local run, but to see the line in full a ride on the Panoramique Autorail is not to be missed.

There is an industrial museum with an interesting collection of tractors and small steam engines.

In the town the Museum of Cheese is worth a visit, as is the old paper mill a few kilometres outside the main town.