| Official Name: | Ala ol Din |
| Native Name: | علاءالدین |
| Settlement Type: | Village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ardabil |
| Subdivision Type2: | County |
| Subdivision Name2: | Kowsar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Firuz |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Sanjabad-e Jonubi |
| Population As Of: | 2006 |
| Population Total: | 186 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 37.5369°N 48.2153°W |
Ala ol Din (Persian: علاءالدین, also Romanized as A‘lā ol Dīn, A‘lā od Dīn, and ‘Alā' od Dīn; also known as Ālādīn) is a village in Sanjabad-e Jonubi Rural District, Firuz District, Kowsar County, Ardabil Province, Iran. At the 2006 census, its population was 186, in 31 families.