| Montreuil-aux-Lions | |
| Commune Status: | Commune |
| Arrondissement: | Château-Thierry |
| Canton: | Essômes-sur-Marne |
| Insee: | 02521 |
| Postal Code: | 02310 |
| Mayor: | Olivier Devron[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Charly sur Marne |
| Coordinates: | 49.0222°N 3.1964°W |
| Elevation M: | 150 |
| Elevation Min M: | 65 |
| Elevation Max M: | 214 |
| Area Km2: | 12.99 |
Montreuil-aux-Lions is a commune in the Aisne department in Hauts-de-France in northern France.