| Ruy-Montceau | |
| Commune Status: | Commune |
| Arrondissement: | La Tour-du-Pin |
| Canton: | Bourgoin-Jallieu |
| Insee: | 38348 |
| Postal Code: | 38300 |
| Mayor: | Denis Giraud[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Porte de l'Isère |
| Coordinates: | 45.5892°N 5.3186°W |
| Elevation M: | 260 |
| Elevation Min M: | 244 |
| Elevation Max M: | 505 |
| Area Km2: | 20.81 |
Ruy-Montceau (in French pronounced as /ʁɥi mɔ̃so/; before August 2015: Ruy)[2] is a commune in the Isère department in southeastern France.[3]
The Bourbre forms most of the commune's southwestern border.
Population data before 1972 refer to the former commune of Ruy, before the merger with Montceau.