| Official Name: | Daydar-e Sofla |
| Native Name: | دايدارسفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Zanjan |
| Subdivision Type2: | County |
| Subdivision Name2: | Ijrud |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Halab |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Ijrud-e Pain |
| Population As Of: | 2006 |
| Population Total: | 69 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.1394°N 48.1125°W |
Daydar-e Sofla (Persian: دايدارسفلي, also Romanized as Dāydār-e Soflá, Daydar Sofla, and Dāidār Sufla; also known as Daidar, Dāydār, Daydar, Dāydār-e Pā’īn, and Dāyedār-e Pā’īn) is a village in Ijrud-e Pain Rural District, Halab District, Ijrud County, Zanjan Province, Iran. At the 2006 census, its population was 69, in 18 families.