Mark Island (Frobisher Bay, Nunavut)  Mark Island is one of the many uninhabited Canadian arctic islands in Qikiqtaaluk Region, Nunavut. It is a Baffin Island offshore island located in Frobisher Bay, southeast of the capital city of Iqaluit. Other islands in the immediate vicinity include Culbertson Island, Low Island, McAllister Island, Peak Island, and Precipice Island.