| Official Name: | Tahalyun |
| Native Name: | تهليون |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kohgiluyeh and Boyer-Ahmad |
| Subdivision Type2: | County |
| Subdivision Name2: | Boyer-Ahmad |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Ludab |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Chin |
| Population As Of: | 2006 |
| Population Total: | 159 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 31.0006°N 50.6789°W |
Tahalyun (Persian: تهليون, also Romanized as Tahalyūn; also known as Tahaldūn and Talkhdān) is a village in Chin Rural District, Ludab District, Boyer-Ahmad County, Kohgiluyeh and Boyer-Ahmad Province, Iran. At the 2006 census, its population was 159, in 31 families.