| Official Name: | Gerdak-e Sepian |
| Native Name: | گردكسپيان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | West Azerbaijan |
| Subdivision Type2: | County |
| Subdivision Name2: | Piranshahr |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Lajan |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Lahijan-e Sharqi |
| Population As Of: | 2006 |
| Population Total: | 640 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.7931°N 45.2708°W |
Gerdak-e Sepian (Persian: گردكسپيان, also Romanized as Gerdak-e Sepīān; also known as Gerd Taspīān) is a village in Lahijan-e Sharqi Rural District, Lajan District, Piranshahr County, West Azerbaijan Province, Iran. At the 2006 census, its population was 640, in 100 families.