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

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 (Ohio), located within Buckeye Lake, Fairfield County

See also

• Ronde Island, Grenada
• List of islands by name (R)