Riom
| Riom | |
|---|---|
| Subprefecture and commune | |
| Buildings of Riom | |
| Location of Riom | |
| Coordinates: 45°53′40″N 3°06′48″E / 45.8944°N 3.1133°E | |
| Country | France | 
| Region | Auvergne-Rhône-Alpes | 
| Department | Puy-de-Dôme | 
| Arrondissement | Riom | 
| Canton | Riom | 
| Intercommunality | CA Riom Limagne et Volcans | 
| Government | |
| • Mayor (2020–2026) | Pierre Pécoul | 
| Area 1 | 31.97 km2 (12.34 sq mi) | 
| Population  (2022) | 18,680 | 
| • Density | 580/km2 (1,500/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 63300 /63200 | 
| Elevation | 337 m (1,106 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Riom (French pronunciation: [ʁjɔ̃] ⓘ; Auvergnat Riam) is a commune in the Puy-de-Dôme department in Auvergne in central France. It is a sub-prefecture of the department.