| Official Name: | Masankup |
| Native Name: | ماسان كوپ |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Golestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Gonbad-e Qabus |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Dashli Borun |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Atrak |
| Population As Of: | 2006 |
| Population Total: | 352 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 37.6258°N 55.2931°W |
Masankup (Persian: ماسان كوپ, also Romanized as Māsānḵūp) is a village in Atrak Rural District, Dashli Borun District, Gonbad-e Qabus County, Golestan Province, Iran. At the 2006 census, its population was 352, in 65 families.