| Building Name: | Oloron Cathedral French: Cathédrale Sainte-Marie d'Oloron-Sainte-Marie |
| Location: | Oloron-Sainte-Marie,  France |
| Geo: | 43.1878°N -0.6161°W |
| Religious Affiliation: | Roman Catholic Church |
| Rite: | Roman |
| Region: | Pyrénées-Atlantiques |
| Province: | Bishopric of Oloron |
| Status: | Cathedral |
| Functional Status: | Active |
| Architecture: | yes |
| Architecture Type: | church |
| Architecture Style: | Romanesque, Gothic |
| Groundbreaking: | 12th century |
Oloron Cathedral (French: Cathédrale Sainte-Marie d'Oloron-Sainte-Marie), now St. Mary's Church (French: Eglise Sainte-Marie), is a Roman Catholic church and former cathedral located in the town of Oloron-Sainte-Marie, in the Pyrénées-Atlantiques département of France. It is in the Romanesque and Gothic architectural traditions.
Construction was started in the 12th century by Gaston IV, Viscount of Béarn. It was the seat of the Bishopric of Oloron, suppressed by the Concordat of 1801.
It has been listed as a monument historique by the French Ministry of Culture since March 1939, and was named a World Heritage Site by UNESCO in 1998.[1]