| Vailly-sur-Aisne | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Vailly-sur-Aisne.svg |
| Arrondissement: | Soissons |
| Canton: | Fère-en-Tardenois |
| Insee: | 02758 |
| Postal Code: | 02370 |
| Mayor: | Arnaud Battefort[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Val de l'Aisne |
| Coordinates: | 49.41°N 3.5172°W |
| Elevation M: | 42 |
| Elevation Min M: | 42 |
| Elevation Max M: | 192 |
| Area Km2: | 9.97 |
Vailly-sur-Aisne (pronounced as /fr/) is a commune in the Aisne department in Hauts-de-France in northern France.
The Commonwealth War Graves Commission maintains a cemetery, Vailly British Cemetery, at Vailly-sur-Aisne.[2]