| Official Name: | Bidak |
| Native Name: | بيدك |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | North Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Bojnord |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Badranlu |
| Population As Of: | 2006 |
| Population Total: | 2,800 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 37.4719°N 57.2197°W |
Bidak (Persian: بيدك, also Romanized as Bīdak) is a village in Badranlu Rural District, in the Central District of Bojnord County, North Khorasan Province, Iran. At the 2006 census, its population was 2,800, in 663 families.