| Daumazan-sur-Arize | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Daumazan-sur-Arize (Ariège).svg |
| Arrondissement: | Saint-Girons |
| Canton: | Arize-Lèze |
| Insee: | 09105 |
| Postal Code: | 09350 |
| Mayor: | Carole Maurette[1] |
| Term: | 2023 - 2026 |
| Coordinates: | 43.1447°N 1.3083°W |
| Elevation M: | 245 |
| Elevation Min M: | 239 |
| Elevation Max M: | 361 |
| Area Km2: | 13.78 |
Daumazan-sur-Arize (in French pronounced as /domazɑ̃ syʁ aʁiz/, literally Daumazan on Arize; Occitan (post 1500);: Daumasan) is a commune in the Ariège department in southwestern France.