| Issou | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Issou (Yvelines).svg |
| Arrondissement: | Mantes-la-Jolie |
| Canton: | Limay |
| Insee: | 78314 |
| Postal Code: | 78440 |
| Mayor: | Lionel Giraud[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CU Grand Paris Seine et Oise |
| Coordinates: | 48.99°N 1.7936°W |
| Elevation M: | 72 |
| Elevation Min M: | 17 |
| Elevation Max M: | 127 |
| Area Km2: | 4.8 |
Issou (in French pronounced as /isu/) is a commune in the Yvelines department, administrative region of Île-de-France, France.