| Mons-en-Laonnois | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Mons-en-Laonnois (Aisne).svg |
| Arrondissement: | Laon |
| Canton: | Laon-1 |
| Insee: | 02497 |
| Postal Code: | 02000 |
| Mayor: | Gérard Charles[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Pays de Laon |
| Coordinates: | 49.5381°N 3.5542°W |
| Elevation M: | 160 |
| Elevation Min M: | 62 |
| Elevation Max M: | 187 |
| Area Km2: | 4.1 |
Mons-en-Laonnois is a commune in the Aisne department in Hauts-de-France in northern France.