| Sepidar Rural District | |
| Native Name: | fa|دهستان سپيدار |
| Settlement Type: | Rural District |
| Pushpin Map: | Iran |
| Coordinates: | 31.6878°N 50.7667°W |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Country |
| Subdivision Name: | Iran |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chaharmahal and Bakhtiari |
| Subdivision Type2: | County |
| Subdivision Name2: | Khanmirza |
| Subdivision Type3: | District |
| Subdivision Name3: | Armand |
| Seat Type: | Capital |
| Seat: | Shahrak-e Sunk |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
Sepidar Rural District (fa|دهستان سپيدار) is in Armand District of Khanmirza County, Chaharmahal and Bakhtiari province, Iran. Its capital is the village of Shahrak-e Sunk,[2] whose population at the time of the 2016 National Census was 1,602 people in 392 households.[3]
In 2018, Armand Rural District and Khanmirza District were separated from Lordegan County in the establishment of Khanmirza County, and Sepidar Rural District was created in the new Armand District.[2]