| Official Name: | Kohneh Hesar |
| Native Name: | كهنه حصار |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Hamadan |
| Subdivision Type2: | County |
| Subdivision Name2: | Kabudarahang |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Gol Tappeh |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Mehraban-e Sofla |
| Population As Of: | 2006 |
| Population Total: | 323 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.6097°N 48.0542°W |
Kohneh Hesar (Persian: كهنه حصار, also Romanized as Kohneh Ḩeşār; also known as Kūh-e Nasār and Kūh-ī-Nasār) is a village in Mehraban-e Sofla Rural District, Gol Tappeh District, Kabudarahang County, Hamadan Province, Iran. At the 2006 census, its population was 323, in 70 families.