Riom (French pronunciation: [ʁjɔ̃] ⓘ; Auvergnat Riam) is a commune in the Puy-de-Dôme department in Auvergne in central France.

In the 14th century the city benefitted from the patronage of Jean, duc de Berry, who rebuilt the Ducal Palace and the Saint-Chapelle.

In 1985 Riom received the French classification of Ville d'Art et d'Histoire recognizing its sixteen classified historical monuments as well as another 57 on the supplementary listings.

[6] The library collection began after the French Revolution and it has been housed in a number of buildings including a college and at Riom city hall.

The special part of the collection consists of 15 medieval manuscripts, which came from revolutionary confiscations made in religious communities.