| Chézy-sur-Marne | |
| Commune Status: | Commune |
| Arrondissement: | Château-Thierry |
| Canton: | Essômes-sur-Marne |
| Insee: | 02186 |
| Postal Code: | 02570 |
| Mayor: | Jean-Claude Bereaux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Charly sur Marne |
| Coordinates: | 48.9886°N 3.3681°W |
| Elevation M: | 64 |
| Elevation Min M: | 57 |
| Elevation Max M: | 220 |
| Area Km2: | 22.43 |
Chézy-sur-Marne (in French pronounced as /ʃezi syʁ maʁn/, literally Chézy on Marne) is a commune in the Aisne department in Hauts-de-France in northern France.
The town was hit by a flash flood and mudslide on 14 June 2009 after a violent localised storm. Cars were floated downstream, cellars and ground-floor rooms in low-lying houses were flooded. Adjacent localities were also affected.