| Official Name: | Kolah Kaj |
| Native Name: | كلاه كج |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Lorestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Selseleh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Yusefvand |
| Population As Of: | 2006 |
| Population Total: | 145 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.8597°N 48.2064°W |
Kolah Kaj (Persian: كلاه كج, also Romanized as Kolāh Kaj) is a village in Yusefvand Rural District, in the Central District of Selseleh County, Lorestan Province, Iran. At the 2006 census, its population was 145, in 28 families.