| Official Name: | Sarang-e Sofla |
| Native Name: | سارنگ سفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Gonabad |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Kakhk |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Kakhk |
| Population As Of: | 2006 |
| Population Total: | 55 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.1417°N 58.5847°W |
Sarang-e Sofla (Persian: سارنگ سفلي, also Romanized as Sārang-e Soflá; also known as Sārang-e Pā’īn and Sārang) is a village in Kakhk Rural District, Kakhk District, Gonabad County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 55, in 21 families.