| Official Name: | Qiasi |
| Native Name: | قياسي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | West Azerbaijan |
| Subdivision Type2: | County |
| Subdivision Name2: | Showt |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Qarah Quyun |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Qarah Quyun-e Jonubi |
| Population As Of: | 2006 |
| Population Total: | 256 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 39.1192°N 45.0325°W |
Qiasi (Persian: قياسي, also Romanized as Qīāsī; also known as Ghiyas, Kiās, Qayās, Qeyās Bālā, Qīās, and Qīās-e Bālā) is a village in Qarah Quyun-e Jonubi Rural District, Qarah Quyun District, Showt County, West Azerbaijan Province, Iran. At the 2006 census, its population was 256, in 47 families.