Round Island or île Ronde may refer to:
Australia Round Island (Queensland), Frankland Islands Round Island (Tasmania), Hogan Group, northern Bass Strait
Canada Round Island, Nova Scotia Round Island (Nunavut) (two: Coutts Inlet, Baffin Bay, and Cross Bay, Chesterfield Inlet; there is also a Round Rocks Island) Île Ronde (Îles Laval), in the Rivière des Prairies, Quebec
China Robert Island (Paracel Islands), also known as Round Island, occupied by China (PRC) and also claimed by Taiwan (ROC) and Vietnam
France île Ronde, Brest, in the roadstead of Brest
Hong Kong Round Island or Pak Sha Chau (白沙洲), in North District Round Island, Hong Kong or Ngan Chau (銀洲), in Southern District
Mauritius île Ronde, Mauritius, an islet on the coast of Mauritius Bolyeriidae, also known as the Round Island boas Round Island day gecko
New Zealand Round Island (Bay of Islands)
Seychelles Round Island, Mahé Round Island, Praslin
United Kingdom Round Island (Dorset) Round Island, County Down, a townland in County Down, Northern Ireland Round Island, County Fermanagh, a townland in County Fermanagh, Northern Ireland Round Island, Isles of Scilly, the location of Round Island Light, Cornwall
United States Round Island (Aleutian Islands), Alaska Round Island (Nanticoke River) in Maryland; see List of islands of Maryland Bumpkin Island, Massachusetts, also known as Round Island Round Island (Michigan) Round Island Light (Michigan), a lighthouse on the above island Round Island (Detroit River), a different island in southeast Michigan Round Island (Mississippi) Iona Island (New York), part of which is known as Round Island Round Island, in Lake Bonaparte (New York) Round Island (Ohio), located within Buckeye Lake, Fairfield County
See also Ronde Island, Grenada List of islands by name (R)