| Official Name: | Chayan |
| Native Name: | چايان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Hamadan |
| Subdivision Type2: | County |
| Subdivision Name2: | Razan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Sardrud |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Sardrud-e Sofla |
| Population As Of: | 2006 |
| Population Total: | 1,109 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.395°N 48.8158°W |
Chayan (Persian: چايان, also Romanized as Chāyān; also known as Chayan Sardrood) is a village in Sardrud-e Sofla Rural District, Sardrud District, Razan County, Hamadan Province, Iran. At the 2006 census, its population was 1,109, in 245 families.