Qarah Su, Razavi Khorasan
Qarah Su 
    قره سو  | |
|---|---|
village  | |
| Coordinates: 36°58′17″N 59°40′52″E / 36.97139°N 59.68111°E | |
| Country | Iran | 
| Province | Razavi Khorasan | 
| County | Kalat | 
| Bakhsh | Central | 
| Rural District | Kabud Gonbad | 
| Population  (2006)  | |
 • Total  | 46 | 
| Time zone | UTC+3:30 (IRST) | 
| • Summer (DST) | UTC+4:30 (IRDT) | 
Qarah Su (Persian: قره سو, also Romanized as Qarah Sū and Qareh Sū; also known as Qara Sū) is a village in Kabud Gonbad Rural District, in the Central District of Kalat County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 46, in 13 families.