| Official Name: | Shahrestanak |
| Native Name: | شهرستانك |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Torbat-e Jam |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Pain Jam |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Zam |
| Population As Of: | 2006 |
| Population Total: | 829 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.1592°N 60.9119°W |
Shahrestanak (Persian: شهرستانك, also Romanized as Shahrestānak; also known as Shahrābād) is a village in Zam Rural District, Pain Jam District, Torbat-e Jam County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 829, in 184 families.