Yankee Harbour is a small inner harbour entered from Shopski Cove between Glacier Bluff and Spit Point, indenting the south-west side of Greenwich Island in the South Shetland Islands, Antarctica. It is 2.35 km (1.46 mi) long in west-south-west to east-north-east direction, and 1.6 km (0.99 mi) wide, and is bounded by Provadiya Hook to the south-west, Parvomay Neck to the north and east, and Kladara Beach to the south.
As well as mosses, lichens and algae, the flowering plants Antarctic Hairgrass and Antarctic Pearlwort occur. The site has been identified as an Important Bird Area by BirdLife International because it supports a breeding colony of about 5000 pairs of Gentoo Penguins. Skuas, Wilson’s Storm Petrels and Snowy Sheathbills are also thought to nest there. Southern Elephant Seals, Weddell Seals and Antarctic Fur Seals regularly haul out on the beaches.