| Official Name: | Pirjad-e Pain |
| Native Name: | پيرجدپايين |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Lorestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Khorramabad |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Koregah-e Sharqi |
| Population As Of: | 2006 |
| Population Total: | 107 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.3278°N 48.4747°W |
Pirjad-e Pain (Persian: پيرجدپايين, also Romanized as Pīrjad-e Pā’īn; also known as Pīrjed, Pīrjerd, and Pīr Jad) is a village in Koregah-e Sharqi Rural District, in the Central District of Khorramabad County, Lorestan Province, Iran. At the 2006 census, its population was 107, in 24 families.