| Montbrehain | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Montbrehain 02.svg |
| Arrondissement: | Saint-Quentin |
| Canton: | Bohain-en-Vermandois |
| Insee: | 02500 |
| Postal Code: | 02110 |
| Mayor: | Gabriel Dirson[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays du Vermandois |
| Coordinates: | 49.9675°N 3.3514°W |
| Elevation M: | 141 |
| Elevation Min M: | 116 |
| Elevation Max M: | 156 |
| Area Km2: | 9.9 |
Montbrehain (in French pronounced as /mɔ̃bʁəɛ̃/) is a commune in the Aisne department in Hauts-de-France in northern France.