| Official Name: | Hoseynabad-e Kushk Zar |
| Native Name: | حسين ابادكوشكذر |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Alborz |
| Subdivision Type2: | County |
| Subdivision Name2: | Savojbolagh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Saidabad |
| Population As Of: | 2006 |
| Population Total: | 174 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 35.9461°N 50.7292°W |
Hoseynabad-e Kushk Zar (Persian: حسين ابادكوشكذر, also Romanized as Ḩoseynābād-e Kūshk Zar and Ḩoseynābād-e Kūshkeh Zar) is a village located in Saidabad Rural District, within the Central District of Savojbolagh County, in the Alborz Province of Iran. At the 2006 census, its population was 174, in 45 families.