| Official Name: | Sarteshniz |
| Native Name: | fa|سرتشنيز |
| Settlement Type: | Village |
| Pushpin Map: | Iran |
| Subdivision Type: | Country |
| Subdivision Name: | Iran |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chaharmahal and Bakhtiari |
| Subdivision Type2: | County |
| Subdivision Name2: | Kiar |
| Subdivision Type3: | District |
| Subdivision Name3: | Kiar-e Sharqi |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Kiar-e Bala |
| Population As Of: | 2016 |
| Population Total: | 2919 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 32.1097°N 50.885°W |
| Coordinates Footnotes: | [1] |
| Elevation M: | 2019 |
Sarteshniz (fa|سرتشنيز) is a village in, and the capital of, Kiar-e Bala Rural District of the Central District of Kiar County, Chaharmahal and Bakhtiari province, Iran.[2]
The village is populated by Persians who speak the Shirazi dialect.[3]
At the time of the 2006 National Census, the village's population was 2,959 in 634 households, when it was in Kiar-e Sharqi Rural District of the former Kiar District of Shahrekord County.[4] The following census in 2011 counted 3,055 people in 823 households,[5] by which time the district had been separated from the county in the establishment of Kiar County. The rural district was transferred to the new Central District.[6] The 2016 census measured the population of the village as 2,919 people in 856 households.[7]
After the 2016 census, the rural district was separated from the district in the formation of Kiar-e Sharqi District. Sarteshniz was transferred to Kiar-e Bala Rural District created in the new district.[2]
Gorz-e-Rostam (Tana) Cave (گرز رستم) is a geological phenomenon located to the north of Sarteshniz.
The village's sole industrial complex is the Kiar Flour Production Company, which is located south of the village. The factory is responsible for providing the eastern section of the province with numerous types of flour.