| Official Name: | Dadeh Beyglu |
| Native Name: | Persian: دده بيگلو |
| Settlement Type: | Village |
| Pushpin Map: | Iran |
| Subdivision Type: | Country |
| Subdivision Name: | Iran |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ardabil |
| Subdivision Type2: | County |
| Subdivision Name2: | Meshgin Shahr |
| Subdivision Type3: | District |
| Subdivision Name3: | Meshgin-e Sharqi |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Qarah Su |
| Population As Of: | 2016 |
| Population Total: | 662 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 38.5544°N 47.8381°W |
| Coordinates Footnotes: | [1] |
Dadeh Beyglu (Persian: دده بيگلو) is a village in Qarah Su Rural District of Meshgin-e Sharqi District, Meshgin Shahr County, Ardabil province, Iran.
At the time of the 2006 National Census, the village's population was 873 in 229 households.[2] The following census in 2011 counted 829 people in 256 households.[3] The 2016 census measured the population of the village as 662 people in 236 households. It was the most populous village in its rural district.[4]