| Official Name: | Shahrestanak |
| Native Name: | شهرستانك |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mazandaran |
| Subdivision Type2: | County |
| Subdivision Name2: | Tonekabon |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Khorramabad |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Seh Hezar |
| Population As Of: | 2006 |
| Population Total: | 75 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.4394°N 50.8728°W |
Shahrestanak (Persian: شهرستانك, also Romanized also spelled as Shahrestānak; also known as Shahrestān) is a village located in Seh Hezar Rural District, Khorramabad District, Tonekabon County, Mazandaran Province, Iran. As of the 2006 census, the village had a population of 75 individuals, residing in 21 families.