| Official Name: | Qeysar |
| Native Name: | قيصار |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Qaen |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Sedeh |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Sedeh |
| Population As Of: | 2006 |
| Population Total: | 111 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.2911°N 59.1389°W |
Qeysar (Persian: قيصار, also Romanized as Qeyşār and Qaisar) is a village in Sedeh Rural District, Sedeh District, Qaen County, South Khorasan Province, Iran. At the 2006 census, its population was 111, in 31 families.