| Official Name: | Hajji Beyk-e Sofla |
| Native Name: | حاجي بيك سفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Golestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Kalaleh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Pishkamar |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Zavkuh |
| Population As Of: | 2006 |
| Population Total: | 619 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 37.5806°N 55.6025°W |
Hajji Beyk-e Sofla (Persian: حاجي بيك سفلي, also Romanized as Ḩājjī Beyk-e Soflá and Ḩājjī Beyg-e Soflá; also known as Ḩājjī Beyk-e Pā’īn) is a village in Zavkuh Rural District, Pishkamar District, Kalaleh County, Golestan Province, Iran.[1] At the 2006 census, its population was 619, in 115 families.