| Official Name: | Granichak |
| Native Name: | Граничак |
| Settlement Type: | Village |
| Pushpin Map: | Bulgaria |
| Pushpin Label Position: | Location in Bulgaria |
| Subdivision Name: |  Bulgaria |
| Subdivision Type1: | Province |
| Subdivision Name1: | Vidin Province |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Belogradchik |
| Leader Title: | Mayor |
| Leader Name: | Boris Nikolov |
| Area Total Km2: | 9.426 |
| Population As Of: | 31-12-2013 |
| Population Note: | Bulgaria Guide |
| Population Total: | 10 |
| Population Footnotes: | [1] |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Postal Code Type: | Postal Code |
| Coordinates: | 43.6428°N 22.5878°W |
Granichak (bg|Граничак) is a village in Vidin Province in northwestern Bulgaria. It is located in the municipality of Belogradchik.