| Official Name: | Masidar-e Sofla |
| Native Name: | ماسيدرسفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kurdistan |
| Subdivision Type2: | County |
| Subdivision Name2: | Marivan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Sarshiv |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Sarshiv |
| Population As Of: | 2006 |
| Population Total: | 295 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.5817°N 46.3322°W |
Masidar-e Sofla (Persian: ماسيدرسفلي, also Romanized as Māsīdar-e Soflá; also known as Māsīdar and Māsīdar-e Pā’īn) is a village in Sarshiv Rural District, Sarshiv District, Marivan County, Kurdistan Province, Iran. At the 2006 census, its population was 295, in 53 families. The village is populated by Kurds.[1]