| Official Name: | Hoseynan |
| Native Name: | حسينان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Semnan |
| Subdivision Type2: | County |
| Subdivision Name2: | Damghan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Amirabad |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Qohab-e Rastaq |
| Population As Of: | 2006 |
| Population Total: | 178 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.2233°N 54.5586°W |
Hoseynan (Persian: حسينان, also Romanized as Ḩoseynān and Ḩoseynān; also known as Ḩoseynīān, Hoseynīyān, Husain Nūd, Husain Nūn, and Husinan) is a village in Qohab-e Rastaq Rural District, Amirabad District, Damghan County, Semnan Province, Iran. At the 2006 census, its population was 178, in 50 families.