| Official Name: | Kalasur |
| Native Name: | كلاسور |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | East Azerbaijan |
| Subdivision Type2: | County |
| Subdivision Name2: | Kaleybar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Misheh Pareh |
| Population As Of: | 2006 |
| Population Total: | 108 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 38.8092°N 46.7525°W |
Kalasur (Persian: كلاسور, also Romanized as Kalāsūr, Kalasoor, and Kelāsūr; also known as Keyālīsūr, Kialiasur, and Kyalyasur) is a village in Misheh Pareh Rural District, in the Central District of Kaleybar County, East Azerbaijan Province, Iran. At the 2006 census, its population was 108, in 22 families.