| Official Name: | Hesar |
| Native Name: | حصار |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | East Azerbaijan |
| Subdivision Type2: | County |
| Subdivision Name2: | Bostanabad |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Ujan-e Gharbi |
| Population As Of: | 2006 |
| Population Total: | 139 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 37.7686°N 46.6881°W |
Hesar (Persian: حصار, also Romanized as Ḩeşār) is a village in Ujan-e Gharbi Rural District, in the Central District of Bostanabad County, East Azerbaijan Province, Iran. At the 2006 census, its population was 139, in 32 families.