| Saint-Martin-du-Frêne | |
| Commune Status: | Commune |
| Arrondissement: | Nantua |
| Canton: | Nantua |
| Insee: | 01373 |
| Postal Code: | 01430 |
| Mayor: | Dominique Turc[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Haut-Bugey Agglomération |
| Coordinates: | 46.1394°N 5.5531°W |
| Elevation M: | 516 |
| Elevation Min M: | 476 |
| Elevation Max M: | 1125 |
| Area Km2: | 19.14 |
Saint-Martin-du-Frêne (pronounced as /fr/) is a commune in the Ain department in eastern France.