| Official Name: | Blacos |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Castile and León#Spain |
| Pushpin Map Caption: | Location in Spain. |
| Subdivision Name3: | Blacos |
| Area Total Km2: | 17 |
| Elevation M: | 1044 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Blacos is a municipality located in the province of Soria, Castile and León, Spain. According to the Municipal Register of Spain, in 2018 the municipality had a population of 44.[1]