Twin Islands
- Eagle Lake (Ontario)
- Lower Twin Island
- North Twin Island (Eagle Lake)
- North Twin Island (Nunavut)
- North Twin Island (Wisconsin)
- South Twin Island (Eagle Lake)
- South Twin Island (Nunavut)
- South Twin Island (Wisconsin)
- Twin Island, New York
- Twin Islands (Andaman and Nicobar Islands)
- Twin Islands (British Columbia)
- Twin Islands (Nunavut)
- Twin Islets
- Upper Twin Island