Fitzroy Island is an island 0.5 mile (0.80467 km) east of the southern tip of Stonington Island

Stonington Island

Stonington Island is a rocky island lying 1 mile northeast of Neny Island in the eastern part of Marguerite Bay, off the west coast of Graham Land. Stonington Island is located at . Stonington Island, 0.4 miles long from northwest to southeast and 0.2 miles wide formerly connected by a drifted snow...

, lying in Neny Bay

Neny Bay

Neny Bay is a small indentation in the west coast of Graham Land which is bounded on the west by Neny Island, and on the northwest and southeast respectively by Stonington Island and Roman Four Promontory. The bay was first charted by the British Graham Land Expedition under Rymill, 1934-37...

 at the foot of Northeast Glacier

Northeast Glacier

Northeast Glacier is a steep, heavily crevassed glacier, 13 miles long and 5 miles wide at its mouth, which flows from McLeod Hill westward and then southwestwards into Marguerite Bay between the Debenham Islands and Roman Four Promontory, on the west coast of Graham Land...

, by which it is partially covered, off the west coast of Graham Land

Graham Land

Graham Land is that portion of the Antarctic Peninsula which lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in...

. The island was presumably first sighted in 1936 by the British Graham Land Expedition

British Graham Land Expedition

A British expedition to Graham Land led by John Lachlan Cope took place between 1920 and 1922. The British Graham Land Expedition was a geophysical and exploration expedition to Graham Land in Antarctica between 1934 to 1937. Under the leadership of John Riddoch Rymill, the expedition spent two...

, and was roughly charted by them and by the U.S. Antarctic Service, 1939–41. It was surveyed in 1947 by the Falklands Islands Dependencies Survey (FIDS) who named it for the RMS Fitzroy, a FIDS ship which visited this area in 1947.