| Official Name: | Hoseynabad-e Pain |
| Native Name: | حسين ابادپائين |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Zirkuh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central District |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Shaskuh |
| Population As Of: | 2006 |
| Population Total: | 125 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.6033°N 59.9728°W |
Hoseynabad-e Pain (Persian: حسين ابادپائين, also Romanized as Ḩoseynābād-e Pā’īn; also known as Ḩoseynābād) is a village in Shaskuh Rural District, Central District, Zirkuh County, South Khorasan Province, Iran. At the 2006 census, its population was 125, in 36 families.