| Montignies-sur-Sambre | |
| Settlement Type: | Former municipality of Belgium |
| Pushpin Map: | Belgium |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Belgium |
| Subdivision Type: | Country |
| Subdivision Name: |  Belgium |
| Subdivision Type1: | Region |
| Subdivision Type2: | Community |
| Subdivision Type3: | Province |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Charleroi |
| Unit Pref: | Imperial |
| Area Total Km2: | 5.98 |
| Population As Of: | 2001 |
| Population Total: | 17771 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 50.3833°N 32°W |
| Postal Code Type: | Postal code |
| Postal Code: | 6061 |
| Area Code: | 071 |
Montignies-sur-Sambre (Walloon: Montgneye-so-Sambe) is a town of Wallonia and a district of the municipality of Charleroi, located in the province of Hainaut, Belgium.
It was a municipality of its own before the fusion of the Belgian municipalities in 1977.
Montignies hosts the UCLouvain Charleroi campus of the University of Louvain.