| Harmignies | |
| Settlement Type: | Sub-municipality of Mons |
| Image Map1: | Harmignies Mons Hainaut Belgium Map.svg |
| Map Caption1: | Location of Harmignies in Mons |
| Pushpin Map: | Belgium#Belgium Hainaut |
| Subdivision Type: | Country |
| Subdivision Type1: | Community |
| Subdivision Type2: | Region |
| Subdivision Type3: | Province |
| Subdivision Type4: | Arrondissement |
| Subdivision Name4: | Mons |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Mons |
| Coordinates: | 50.4078°N 4.0178°W |
| Area Total Km2: | 11.12 |
| Population As Of: | 2020-01-01 |
| Population Total: | 835 |
| Population Density Km2: | auto |
| Postal Code Type: | Postal codes |
| Postal Code: | 7022 |
| Area Code Type: | Area codes |
| Area Code: | 065 |
Harmignies (in French pronounced as /aʁmiɲi/; Walloon: Armégnî) is a sub-municipality of the city of Mons located in the province of Hainaut, Wallonia, Belgium. It was a separate municipality until 1977. On 1 January 1977, it was merged into Mons.[1]