| Type: | municipality |
| Montanuy | |
| Native Name: | Catalan; Valencian: Montanui (Ribagorçan) |
| Pushpin Map: | Spain Aragon#Spain |
| Coordinates: | 42.4667°N 42°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Area Total Km2: | 174 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Montanuy (pronounced as /es/), in Ribagorçan Catalan and Aragonese: Montanui[1] (in Catalan; Valencian pronounced as /montaˈnuj/) is a municipality located in the province of Huesca, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 308 inhabitants.