| Official Name: | Hammam Bou Hadjar |
| Subdivision Type1: | Province |
| Subdivision Name: | Algeria |
| Area Total Km2: | 180.34 |
| Population As Of: | 2010[1] |
| Population Total: | 35158 |
| Population Density Km2: | auto |
| Timezone: | West Africa Time |
| Utc Offset: | +1 |
| Coordinates: | 35.3792°N -0.9706°W |
Hammam Bou Hadjar (Arabic: حمام بو حجار) is a town in northwestern Algeria.