| Montesquiou | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Montesquiou (Gers).svg |
| Arrondissement: | Mirande |
| Canton: | Pardiac-Rivière-Basse |
| Insee: | 32285 |
| Postal Code: | 32320 |
| Mayor: | Étienne Verret[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Cœur d'Astarac en Gascogne |
| Coordinates: | 43.5794°N 0.3297°W |
| Elevation M: | 277 |
| Elevation Min M: | 145 |
| Elevation Max M: | 256 |
| Area Km2: | 46.8 |
Montesquiou (in French pronounced as /mɔ̃tɛskju/; Gascon: Montesquiu) is a commune in the Gers department, Southwestern France. It is the historic seat of the Montesquiou family.