| Sepidar Rural District | |
| Native Name: | Persian: 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 (Persian: 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 August 2018, Armand Rural District and Khanmirza District were separated from the county in the establishment of Khanmirza County, which was divided into two districts of two rural districts each, with Aluni as its capital and only city. Sepidar Rural District was created in the new Armand District.[2]