| Official Name: | Kahan-e Pain |
| Native Name: | كاهان پائين |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Khoshab |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Meshkan |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Meshkan |
| Population As Of: | 2006 |
| Population Total: | 81 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.7811°N 58.1711°W |
Kahan-e Pain (fa|كاهان پائين, also Romanized as Kāhān-e Pā’īn; also known as Kāhān-e Soflá) is a village in Meshkan Rural District, Meshkan District, Khoshab County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 81, in 20 families.