| Building Name: | Riez Cathedral French: Cathédrale Notre-Dame-de-l'Assomption de Riez |
| Location: | Riez,  France |
| Geo: | 43.8183°N 6.0908°W |
| Religious Affiliation: | Roman Catholic Church |
| Rite: | Roman Rite |
| Region: | Alpes-de-Haute-Provence |
| Province: | Bishopric of Riez |
| Status: | Cathedral |
| Functional Status: | Active |
| Architecture: | yes |
| Architecture Type: | church |
Riez Cathedral (Cathédrale Notre-Dame-de-l'Assomption de Riez) is a Roman Catholic church located in the town of Riez in the département of Alpes-de-Haute-Provence in south-eastern France. It is a national monument.
It was formerly the seat of the Bishopric of Riez, abolished by the Concordat of 1801, which transferred its territory to the Bishopric of Digne.