| Tournan | |
| Commune Status: | Commune |
| Arrondissement: | Auch |
| Canton: | Val de Save |
| Insee: | 32451 |
| Postal Code: | 32420 |
| Mayor: | Jean-Luc Mimouni[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Savès |
| Coordinates: | 43.4328°N 0.785°W |
| Elevation M: | 273 |
| Elevation Min M: | 184 |
| Elevation Max M: | 305 |
| Area Km2: | 12.56 |
Tournan (in French pronounced as /tuʁnɑ̃/; Occitan (post 1500);: Tornan) is a commune in the Gers department in southwestern France.
The river Gesse forms most of the commune's southeastern border.