| Official Name: | Besk |
| Native Name: | بسك |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Torbat-e Heydarieh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Bayg |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Bayg |
| Population As Of: | 2006 |
| Population Total: | 430 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.3917°N 59.0189°W |
Besk (Persian: بسك; also known as Besg, Baiāq, Bāyak, Bāyg, and Bish Baik) is a village in Bayg Rural District, Bayg District, Torbat-e Heydarieh County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 430, in 121 families.