| Mordelles | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Image Flag: | Flag of Mordelles.svg |
| Image Coat Of Arms: | Ecu de gueules au croissant d'or.svg |
| Coordinates: | 48.0756°N -1.8447°W |
| Insee: | 35196 |
| Postal Code: | 35310 |
| Arrondissement: | Rennes |
| Canton: | Le Rheu |
| Mayor: | Thierry Le Bihan[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Rennes Métropole |
| Elevation Min M: | 19 |
| Elevation Max M: | 51 |
| Area Km2: | 29.84 |
Mordelles (pronounced as /fr/; ; Gallo: Mordèll) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France.
The river Meu forms the commune's southwestern border.
Inhabitants of Mordelles are called in French Mordelais.