| Official Name: | Taj ol Din Mahalleh |
| Native Name: | تاج الدين محله |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mazandaran |
| Subdivision Type2: | County |
| Subdivision Name2: | Sari |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Rudpey-ye Jonubi |
| Population As Of: | 2006 |
| Population Total: | 404 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.7056°N 52.9939°W |
Taj ol Din Mahalleh (Persian: تاج الدين محله, also Romanized as Tāj ol Dīn Maḩalleh; also known as Tāj od Dīn) is a village in Rudpey-ye Jonubi Rural District, in the Central District of Sari County, Mazandaran Province, Iran. At the 2006 census, its population was 404, in 112 families.