| Type: | municipality |
| Official Name: | Almunia de San Juan |
| Flag Size: | 150 |
| Subdivision Name3: | Almunia de San Juan |
| Area Total Km2: | 35 |
| Elevation M: | 349 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Almunia de San Juan is a municipality located in the province of Huesca, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 660 inhabitants.