| Rouy-le-Grand | |
| Commune Status: | Commune |
| Arrondissement: | Péronne |
| Canton: | Ham |
| Insee: | 80683 |
| Postal Code: | 80190 |
| Mayor: | Francis Urier[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Est de la Somme |
| Coordinates: | 49.7761°N 2.9597°W |
| Elevation M: | 63 |
| Elevation Min M: | 52 |
| Elevation Max M: | 79 |
| Area Km2: | 3.81 |
Rouy-le-Grand (in French pronounced as /ʁwi lə ɡʁɑ̃/) is a commune in the Somme department in Hauts-de-France in northern France.
The commune is situated 53km (33miles) southeast of Amiens, on the C2 road.