| Settlement Type: | municipality |
| Official Name: | Bailo, Spain |
| Subdivision Name3: | Bailo |
| Area Total Km2: | 164 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Bailo is a municipality located in the province of Huesca, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 256 inhabitants.