| Monthoiron | |
| Commune Status: | Commune |
| Arrondissement: | Châtellerault |
| Canton: | Chauvigny |
| Insee: | 86164 |
| Postal Code: | 86210 |
| Mayor: | Patrice Azile[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Grand Châtellerault |
| Coordinates: | 46.7342°N 0.6211°W |
| Elevation M: | 130 |
| Elevation Min M: | 63 |
| Elevation Max M: | 141 |
| Area Km2: | 16.66 |
Monthoiron (in French pronounced as /mɔ̃twaʁɔ̃/) is a commune in the Vienne department in the Nouvelle-Aquitaine region in western France.