| Vieux-Reng | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Vieux-Reng (Nord).svg |
| Arrondissement: | Avesnes-sur-Helpe |
| Canton: | Maubeuge |
| Insee: | 59618 |
| Postal Code: | 59600 |
| Mayor: | Jean-Pierre Manfroy[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Maubeuge Val de Sambre |
| Coordinates: | 50.33°N 4.0478°W |
| Elevation M: | 123 |
| Elevation Min M: | 113 |
| Elevation Max M: | 148 |
| Area Km2: | 11.64 |
Vieux-Reng (in French pronounced as /vjø ʁɑ̃/) is a commune in the Nord department in northern France.[2]
Its neighbouring village across the border with Belgium is called Grand-Reng.