| Coincy | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Coincy (Aisne).svg |
| Arrondissement: | Château-Thierry |
| Canton: | Château-Thierry |
| Insee: | 02203 |
| Postal Code: | 02210 |
| Mayor: | Alain Arnefaux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Région de Château-Thierry |
| Coordinates: | 49.1617°N 3.4225°W |
| Elevation M: | 102 |
| Elevation Min M: | 91 |
| Elevation Max M: | 218 |
| Area Km2: | 17.24 |
Coincy (pronounced as /fr/) is a commune in the Aisne department in Hauts-de-France in northern France. It is located approximately 35miles west of Reims (in Marne, Grand-Est).