| Official Name: | Duz Aychi |
| Native Name: | دوزايچي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | East Azerbaijan |
| Subdivision Type2: | County |
| Subdivision Name2: | Charuymaq |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Shadian |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Charuymaq-e Jonubesharqi |
| Population As Of: | 2006 |
| Population Total: | 39 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 37.0067°N 47.1567°W |
Duz Aychi (Persian: دوزايچي, also Romanized as Dūz Āychī and Dūzāychī) is a village in Charuymaq-e Jonubesharqi Rural District, Shadian District, Charuymaq County, East Azerbaijan Province, Iran.
The closest major cities include Bukan, Zanjan, Tabriz and Ardabil. At the 2006 census, its population was 39, in 7 families.