| Séry-lès-Mézières | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Quentin |
| Canton: | Ribemont |
| Insee: | 02717 |
| Postal Code: | 02240 |
| Mayor: | Stéphanie Gosset[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Val de l'Oise |
| Coordinates: | 49.775°N 3.4206°W |
| Elevation M: | 75 |
| Elevation Min M: | 57 |
| Elevation Max M: | 115 |
| Area Km2: | 11.51 |
Séry-lès-Mézières (in French pronounced as /seʁi lɛ mezjɛʁ/, literally Séry near Mézières) is a commune in the Aisne department in Hauts-de-France in northern France.