| Cilly | |
| Commune Status: | Commune |
| Arrondissement: | Laon |
| Canton: | Marle |
| Insee: | 02194 |
| Postal Code: | 02250 |
| Mayor: | Pierre-Jean Henninot[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de la Serre |
| Coordinates: | 49.7383°N 3.8328°W |
| Elevation M: | 96 |
| Elevation Min M: | 81 |
| Elevation Max M: | 167 |
| Area Km2: | 9.3 |
Cilly is a commune in the Aisne department in Hauts-de-France in northern France.