| Official Name: | Bag Reza |
| Native Name: | بگ رضا |
| 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: | Zagheh |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Qaedrahmat |
| Population As Of: | 2006 |
| Population Total: | 319 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.4683°N 48.8328°W |
Bag Reza (Persian: بگ رضا, also Romanized as Bag Rezā; also known as Beyg Reẕā, ‘Alīābād-e Beyg Reẕā, and ‘Alīābād-e Beyg Rezā) is a village in Qaedrahmat Rural District, Zagheh District, Khorramabad County, Lorestan Province, Iran. At the 2006 census, its population was 319, in 71 families.