| Official Name: | Emamzadeh Pir Nahan |
| Native Name: | امامزاده پيرنهان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Hamadan |
| Subdivision Type2: | County |
| Subdivision Name2: | Hamadan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Shara |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Jeyhun Dasht |
| Population As Of: | 2006 |
| Population Total: | 723 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.0114°N 49.0411°W |
Emamzadeh Pir Nahan (Persian: امامزاده پيرنهان, also Romanized as Emāmzādeh Pīr Nahān; also known as Pīr Nahān and Pīr Nehān) is a village in Jeyhun Dasht Rural District, Shara District, Hamadan County, Hamadan Province, Iran. At the 2006 census, its population was 723, in 155 families.