| Official Name: | Seyjan |
| Native Name: | سيجان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Markazi |
| Subdivision Type2: | County |
| Subdivision Name2: | Komijan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Milajerd |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Khosrow Beyk |
| Population As Of: | 2006 |
| Population Total: | 208 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.8094°N 49.1772°W |
Seyjan (Persian: سيجان, also Romanized as Seyjān; also known as Sīchān) is a village in Khosrow Beyk Rural District, Milajerd District, Komijan County, Markazi Province, Iran. At the 2006 census, its population was 208, in 56 families.