| Le Châtelet-sur-Sormonne | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Le Châtelet-sur-Sormonne.svg |
| Arrondissement: | Charleville-Mézières |
| Canton: | Rocroi |
| Insee: | 08110 |
| Postal Code: | 08150 |
| Mayor: | Marie-Christine Tessari[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.8281°N 4.5217°W |
| Elevation M: | 185 |
| Area Km2: | 9.85 |
Le Châtelet-sur-Sormonne (in French pronounced as /lə ʃatlɛ syʁ sɔʁmɔn/, literally Le Châtelet on Sormonne) is a commune in the Ardennes department in northern France.
The river Sormonne flows through the commune and crosses the village of Châtelet-sur-Sormonne.