1. Indonesian Archipelago: This is the world's largest island group and is located in Southeast Asia. It consists of over 17,000 islands, including Java, Sumatra, Borneo, Sulawesi, and Papua New Guinea.
2. Philippines: The Philippines is an island country in Southeast Asia that is made up of over 7,000 islands. The largest islands are Luzon, Mindanao, Visayas, and Palawan.
3. West Indies: This island group is located in the Caribbean Sea and is made up of over 700 islands. The largest islands are Cuba, Hispaniola (which is divided into Haiti and the Dominican Republic), Jamaica, Puerto Rico, and Trinidad and Tobago.
4. Malay Archipelago: The Malay Archipelago is a region in Southeast Asia that includes the Indonesian Archipelago, the Philippines, and the Malaysian Archipelago. It is one of the most biodiverse regions in the world.
5. Japanese Archipelago: This island group is located in East Asia and is made up of over 6,800 islands. The largest islands are Honshu, Hokkaido, Kyushu, and Shikoku.
6. British Isles: The British Isles is an archipelago located in the North Atlantic Ocean off the coast of Europe. It consists of the islands of Great Britain, Ireland, the Isle of Man, and the Channel Islands.
7. Caribbean: The Caribbean is a region of the Americas that includes the West Indies, the Caribbean Sea, and the surrounding islands. It is one of the most popular tourist destinations in the world.
8. Madagascar and the Indian Ocean Islands: Madagascar is an island country located off the coast of Africa. It is the fourth-largest island in the world. Other notable islands in this region include the Seychelles, Mauritius, and Réunion.
9. Aleutian Islands: The Aleutian Islands are a chain of volcanic islands located in the North Pacific Ocean. They belong to the United States and stretch from the Alaska Peninsula to the Kamchatka Peninsula in Russia.
10. Hawaii: Hawaii is an island group located in the central Pacific Ocean. It is the fiftieth state of the United States and is made up of eight major islands, including Hawaii Island, Maui, Oahu, and Kauai.