| Official Name: | Jahanabad |
| Native Name: | جهان اباد |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Qazvin |
| Subdivision Type2: | County |
| Subdivision Name2: | Buin Zahra |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Zahray-ye Pain |
| Population As Of: | 2006 |
| Population Total: | 844 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.7739°N 50.1236°W |
Jahanabad (Persian: جهان اباد, also Romanized as Jahānābād) is a village in Zahray-ye Pain Rural District, in the Central District of Buin Zahra County, Qazvin Province, Iran. At the 2006 census, its population was 844, in 209 families.