 Location of Robert Island in the South Shetland Islands | |
  Oescus Island Location of Oescus Island  Oescus Island Oescus Island (Antarctic Peninsula) | |
| Geography | |
|---|---|
| Location | Antarctica |
| Coordinates | 62°21′07″S 59°41′15.5″W / 62.35194°S 59.687639°W |
| Archipelago | South Shetland Islands |
| Administration | |
| Administered under the Antarctic Treaty System | |
| Demographics | |
| Population | Uninhabited |
Oescus Island (Bulgarian: остров Ескус, romanized: ostrov Eskus, IPA: [ˈɔstrof ˈɛskos]) is the low ice-free island in the Onogur group off the northwest coast of Robert Island in the South Shetland Islands, Antarctica extending 380 m in southeast–northwest direction and 40 m wide. The feature comprises two parts connected by a spit, and is separated from Redina Island, Kovach Island and Leeve Island by passages 120 m, 160 m and 130 m wide respectively.
The island is named after the ancient Roman town of Oescus in Northern Bulgaria.