| Official Name: | Buin-e Owzin Qajaq |
| Native Name: | بوئين اوزين قجق |
| Settlement Type: | village |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Golestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Gonbad-e Qabus |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Aqabad |
| Population As Of: | 2006 |
| Population Total: | 620 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
Buin-e Owzin Qajaq (Persian: بوئين اوزين قجق, also Romanized as Bū'īn Owzīn Qajaq) is a village in Aqabad Rural District, in the Central District of Gonbad-e Qabus County, Golestan Province, Iran. At the 2006 census, its population was 620, in 102 families.