| Official Name: | Qamar Khun |
| Native Name: | قمارخان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Markazi |
| Subdivision Type2: | County |
| Subdivision Name2: | Shazand |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Zalian |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Zalian |
| Population As Of: | 2006 |
| Population Total: | 66 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.8897°N 48.99°W |
Qamar Khun (Persian: قمارخان, also Romanized as Qamār Khūn; also known as Qal‘eh Samar Khān, Qal‘eh Samūr Khān, and Qal‘eh-ye S̄amūr Khān) is a village in Zalian Rural District, Zalian District, Shazand County, Markazi Province, Iran. At the 2006 census, its population was 66, in 16 families.