| Wasnes-au-Bac | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Wasnes-au-Bac (Nord).svg |
| Arrondissement: | Valenciennes |
| Canton: | Denain |
| Insee: | 59645 |
| Postal Code: | 59252 |
| Mayor: | Anne Avé-Delattre[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Porte du Hainaut |
| Coordinates: | 50.2714°N 3.26°W |
| Elevation M: | 42 |
| Elevation Min M: | 32 |
| Elevation Max M: | 63 |
| Area Km2: | 5.19 |
Wasnes-au-Bac (in French pronounced as /wan o bak/) is a commune in the Nord department in northern France.[2]