| Image Coat Of Arms: | Blason de la ville de Monchaux-sur-Écaillon (59) Nord-France.svg |
| Monchaux-sur-Écaillon | |
| Commune Status: | Commune |
| Arrondissement: | Valenciennes |
| Canton: | Aulnoy-lez-Valenciennes |
| Insee: | 59407 |
| Postal Code: | 59224 |
| Mayor: | Bernard de Meyer[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Valenciennes Métropole |
| Coordinates: | 50.2872°N 3.4561°W |
| Elevation M: | 28 |
| Elevation Min M: | 31 |
| Elevation Max M: | 84 |
| Area Km2: | 4.55 |
Monchaux-sur-Écaillon (in French pronounced as /mɔ̃ʃo syʁ ekajɔ̃/, literally Monchaux on Écaillon) is a commune in the Nord department in northern France.[2]