| Dému | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Dému (Gers).svg |
| Arrondissement: | Condom |
| Canton: | Fezensac |
| Insee: | 32115 |
| Postal Code: | 32190 |
| Mayor: | Thierry Frenot[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Grand Armagnac |
| Coordinates: | 43.7664°N 0.1672°W |
| Elevation M: | 171 |
| Elevation Min M: | 137 |
| Elevation Max M: | 232 |
| Area Km2: | 28.89 |
Dému (in French pronounced as /demy/; Occitan (post 1500);: Demú) is a commune in the Gers department in southwestern France.
Dému features as a main setting in the Michael Ondaatje novel Divisadero.