| Official Name: | Emamzadeh Ala Eddin |
| Native Name: | امامزاده علاالدين |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Qazvin |
| Subdivision Type2: | County |
| Subdivision Name2: | Avaj |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Kharaqan-e Gharbi |
| Population As Of: | 2006 |
| Population Total: | 284 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 35.6558°N 49.0858°W |
Emamzadeh Ala Eddin (Persian: امامزاده علاالدين, also Romanized as Emāmzādeh ‘Alā Eddīn and Emāmzādeh ‘Alā’ Eddīn) is a village in Kharaqan-e Gharbi Rural District, Central District, Avaj County, Qazvin Province, Iran. In 2006, its population was 284, in 84 families.