| Official Name: | Bai |
| Native Name: | بايي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Bakharz |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Bala Velayat |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Bala Velayat |
| Population As Of: | 2006 |
| Population Total: | 374 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.1833°N 60.1944°W |
Bai (Persian: بايي, also Romanized as Bā’ī) is a village in Bala Velayat Rural District, Bala Velayat District, Bakharz County, Razavi Khorasan Province, Iran. As per the 2006 census, its population was 374, in 72 families.