| Rusokastro Rock | |
| Image Map Caption: | Location of Greenwich Island in the South Shetland Islands |
| Pushpin Map: | Antarctic Peninsula#Antarctica |
| Pushpin Map Caption: | Location on Antarctic Peninsula##Location in Antarctica |
| Pushpin Map Relief: | yes |
| Location: | Antarctica |
| Coordinates: | -62.4049°N -60.0861°W |
| Archipelago: | South Shetland Islands |
| Population: | uninhabited |
| Country: | Antarctica |
| Treaty System: | Antarctic Treaty System |
Rusokastro Rock (bg|скала Русокастро, ‘Skala Rusokastro’ ska-'la ru-so-'kas-tro) is a twin rock at the north entrance to McFarlane Strait in the South Shetland Islands, Antarctica extending in northwest–southeast direction and wide, with its two parts separated by a wide passage. It is situated 1.62NaN2 northeast of Pyramid Island, 5.72NaN2 northeast of Williams Point on Livingston Island, and 5.72NaN2 northwest of Duff Point on Greenwich Island. The area was visited by early 19th century sealers.
The rock is named after the settlement and medieval fortress of Rusokastro in southeastern Bulgaria.
Rusokastro Rock is located at -62.405°N -60.0853°W (Bulgarian mapping in 2009).
L.L. Ivanov. Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands. Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 2009.
