| Official Name: | Hoseynabad-e Shah Nazar |
| Native Name: | حسين ابادشاه نظر |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Qazvin |
| Subdivision Type2: | County |
| Subdivision Name2: | Buin Zahra |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Shal |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Zeynabad |
| Population As Of: | 2006 |
| Population Total: | 286 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.9833°N 49.8167°W |
Hoseynabad-e Shah Nazar (Persian: حسين ابادشاه نظر, also Romanized as Ḩoseynābād-e Shāh Naz̧ar; also known as Ḩoseynābād) is a village in Zeynabad Rural District, Shal District, Buin Zahra County, Qazvin Province, Iran. At the 2006 census, its population was 286, in 53 families.