| Official Name: | Ajin Dojin |
| Native Name: | اجين دوجين |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Alborz |
| Subdivision Type2: | County |
| Subdivision Name2: | Savojbolagh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Chendar |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Chendar |
| Population As Of: | 2006 |
| Population Total: | 578 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 35.9919°N 50.8356°W |
Ajin Dojin (fa|اجين دوجين, also Romanized as Ājīn Dojīn) is a village in Chendar Rural District, Chendar District, Savojbolagh County, Alborz Province, Iran. It was named after the historical, and some would say, fictional, ruler of the town, Ajin. Before he was killed in a coup. At the 2006 census, its population was 578, in 174 families.