| Ressons-le-Long | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Ressons-le-long (Aisne).svg |
| Arrondissement: | Soissons |
| Canton: | Vic-sur-Aisne |
| Insee: | 02643 |
| Postal Code: | 02290 |
| Mayor: | Nicolas Rébérot[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.3889°N 3.1494°W |
| Elevation M: | 72 |
| Elevation Min M: | 37 |
| Elevation Max M: | 150 |
| Area Km2: | 10.55 |
Ressons-le-Long (pronounced as /fr/) is a commune in the Aisne department in Hauts-de-France in northern France.