| Chazey-sur-Ain | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Chazey-sur-Ain (Ain).svg |
| Arrondissement: | Belley |
| Canton: | Lagnieu |
| Insee: | 01099 |
| Postal Code: | 01150 |
| Mayor: | Claire André[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Plaine de l'Ain |
| Coordinates: | 45.8933°N 5.2558°W |
| Elevation M: | 230 |
| Elevation Min M: | 202 |
| Elevation Max M: | 261 |
| Area Km2: | 21.95 |
Chazey-sur-Ain (in French pronounced as /ʃazɛ syʁ ɛ̃/, literally Chazey on Ain) is a commune in the Ain department in eastern France.