| Official Name: | Hesar |
| Native Name: | حصار |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Markazi |
| Subdivision Type2: | County |
| Subdivision Name2: | Zarandieh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Kharqan |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Duzaj |
| Population As Of: | 2006 |
| Population Total: | 65 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.4356°N 49.9136°W |
Hesar (Persian: حصار, also Romanized as Ḩeşār; also known as Ashahr) is a village in Duzaj Rural District, Kharqan District, Zarandieh County, Markazi Province, Iran. At the 2006 census, its population was 65, in 23 families.