Sepidar Rural District (Khanmirza County)
Sepidar Rural District 
    Persian: دهستان سپيدار  | |
|---|---|
| Coordinates: 31°41′16″N 50°46′00″E / 31.68778°N 50.76667°E | |
| Country | Iran | 
| Province | Chaharmahal and Bakhtiari | 
| County | Khanmirza | 
| District | Armand | 
| Established | 2019 | 
| Capital | Shahrak-e Sunk | 
| Time zone | UTC+3:30 (IRST) | 
Sepidar Rural District (Persian: دهستان سپيدار) is in Armand District of Khanmirza County, Chaharmahal and Bakhtiari province, Iran. Its capital is the village of Shahrak-e Sunk, whose population at the time of the 2016 National Census was 1,602 people in 392 households.
Other villages in the rural district include Buger, Mesen, and Sar Tang-e Mesen.