| Official Name: | Hoseynabad-e Saghar |
| Native Name: | حسين آباد ساغر |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Semnan |
| Subdivision Type2: | County |
| Subdivision Name2: | Shahrud |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Howmeh |
| Population As Of: | 2006 |
| Population Total: | 53 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.3281°N 55.0106°W |
Hoseynabad-e Saghar (Persian: حسين آباد ساغر, also Romanized as Ḩoseynābād-e Sāghar; also known as Ḩoseynābād Sāgharī) is a village in Howmeh Rural District, in the Central District of Shahrud County, Semnan Province, Iran. At the 2006 census, its population was 53, in 14 families.