Ribnik Island
| Geography | |
|---|---|
| Location | Antarctica | 
| Coordinates | 65°22′05″S 65°21′34″W / 65.36806°S 65.35944°W | 
| Archipelago | Biscoe Islands | 
| Administration | |
| Administered under the Antarctic Treaty System | |
| Demographics | |
| Population | 0 | 
Ribnik Island (Bulgarian: остров Рибник, romanized: ostrov Ribnik, IPA: [ˈɔstrof ˈribnik]) is a mostly ice-covered island in the Pitt group of Biscoe Islands, Antarctica. The feature is 1 km long in southwest-northeast direction and 500 m wide.
The island is named after the settlement of Ribnik in Southwestern Bulgaria.