| Official Name: | Sedin-e Yek |
| Native Name: | ثدين 1 |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Khuzestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Bavi |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Veys |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Veys |
| Population As Of: | 2006 |
| Population Total: | 620 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 31.3631°N 48.8192°W |
Sedin-e Yek (fa|ثدين 1, also Romanized as Sedīn-e Yek; also known as Sedeyen-e Yek, Sedeyyen-e Bālā, Sedeyyen-e Yek, Seyyedīn-e Bālā, and Seyyedīn-e Yek)[1] is a village in Veys Rural District, Veys District, Bavi County, Khuzestan Province, Iran. At the 2006 census, its population was 620, in 103 families.