| Official Name: | Castejón de Monegros, Spain |
| Subdivision Name3: | Castejón de Monegros |
| Area Total Km2: | 165 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Castejón de Monegros (Aragonese: Castillón de Monegros) is a municipality located in the province of Huesca, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 683 inhabitants.