| Official Name: | Seyyedan |
| Native Name: | دارالسّیاده سیّدان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Darmian |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Qohestan |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Fakhrud |
| Population As Of: | 2006 |
| Population Total: | 412 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.0178°N 59.6214°W |
Seyyedan (Persian: سيدان, also Romanized as Seyyedān and Seyyed Dān; also known as Sendādān, Saiyidādān, and Seyyedādān) is a village in Fakhrud Rural District, Qohestan District, Darmian County, South Khorasan Province, Iran. At the 2006 census, its population was 412, in 101 families.