The Twin Islands are similarly shaped Arctic islands located east of Akimiski Island in James Bay on the southern end of Hudson Bay. The group includes North Twin and South Twin islands. They are part of the Qikiqtaaluk Region of the Canadian territory of Nunavut.

The Twin Island are an important breeding site for Canada Geese and Semipalmated Plovers. The most dominant waterfowl include Green-winged Teal, Lesser Scaup, Northern Pintail, and Oldsquaw. Dominant shorebirds include Dunlin and Purple Sandpiper, Least Sandpiper, Red-necked Phalarope, and Semipalmated Sandpipers. The islands are home to resident Willow Ptarmigans and Arctic Terns.