| Official Name: | Komasi-ye Vosta |
| Native Name: | كماسي وسطي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kermanshah |
| Subdivision Type2: | County |
| Subdivision Name2: | Harsin |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Cheshmeh Kabud |
| Population As Of: | 2006 |
| Population Total: | 89 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.1797°N 47.5131°W |
Komasi-ye Vosta (Persian: كماسي وسطي, also Romanized as Komāsī-ye Vosţá; also known as Komāsī) is a village in Cheshmeh Kabud Rural District, in the Central District of Harsin County, Kermanshah Province, Iran. At the 2006 census, its population was 89, in 19 families.