| Official Name: | Estakhr Sar |
| Native Name: | استخرسر |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mazandaran |
| Subdivision Type2: | County |
| Subdivision Name2: | Savadkuh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Rastupey |
| Population As Of: | 2016 |
| Population Total: | 174 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 36.1378°N 53.0353°W |
Estakhr Sar (fa|استخرسر) is a village in Rastupey Rural District, in the Central District of Savadkuh County, Mazandaran Province, Iran. At the 2006 census, its population was 174, in 49 families, up from 109 people in 2006.