| Type: | municipality |
| Official Name: | Alarba |
| Subdivision Name3: | Alarba |
| Area Total Km2: | 19 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Pushpin Map: | Spain Aragon#Spain#Europe |
| Coordinates: | 41.2°N -38°W |
Alarba is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 143 inhabitants.