| Saint-Denis-en-Bugey | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Denis-en-Bugey (Ain).svg |
| Arrondissement: | Belley |
| Canton: | Ambérieu-en-Bugey |
| Insee: | 01345 |
| Postal Code: | 01500 |
| Mayor: | Pascal Collignon[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Plaine de l'Ain |
| Coordinates: | 45.95°N 5.3333°W |
| Elevation M: | 250 |
| Elevation Min M: | 234 |
| Elevation Max M: | 338 |
| Area Km2: | 2.61 |
Saint-Denis-en-Bugey (pronounced as /fr/) is a commune in the eastern French department of Ain.
The town lies on the left bank of the river Albarine, which forms all of the commune's northern border.