| Official Name: | Hoseynabad-e Tappeh Sari |
| Native Name: | حسين ابادتپه سري |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Golestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Ramian |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Fenderesk |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Fenderesk-e Jonubi |
| Population As Of: | 2006 |
| Population Total: | 530 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.9786°N 54.9386°W |
Hoseynabad-e Tappeh Sari (Persian: حسين ابادتپه سري, also Romanized as Ḩoseynābād-e Tappeh Sarī; also known as Ḩoseynābād-e Tappehsar) is a village in Fenderesk-e Jonubi Rural District, Fenderesk District, Ramian County, Golestan Province, Iran. At the 2006 census, its population was 530, in 123 families.