| Poncin | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Poncin (Ain).svg |
| Arrondissement: | Nantua |
| Canton: | Pont-d'Ain |
| Insee: | 01303 |
| Postal Code: | 01450 |
| Mayor: | Jean-Michel Giroux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Rives de l'Ain - Pays du Cerdon |
| Coordinates: | 46.0833°N 5.4°W |
| Elevation M: | 265 |
| Elevation Min M: | 240 |
| Elevation Max M: | 540 |
| Area Km2: | 19.77 |
Poncin (pronounced as /fr/) is a commune in the Ain department in eastern France. It lies on the banks of the river Ain.
Of strategic importance during medieval times, Poncin is surrounded by city walls that are still in perfect shape despite their age. The village was originally intended to receive the same patronage as Pérouges but the plan never reached fruition.