The World’s Biggest Islands Revealed

Diverse Landscapes and Populations

Greenland tops the list as the world’s largest island. It’s a vast territory, primarily covered in ice, located between North America and Europe. This ranking details the 25 biggest landmasses globally, measured by total area in square kilometers. The information is current as of May 6, 2026.

Island size is a fascinating geographical topic. Many assume Australia is the largest, but it’s technically considered a continent. This list focuses on islands – large landmasses completely surrounded by water. Greenland’s immense size dwarfs all others, covering 2,166,086 square kilometers. New Guinea ranks second at 785,753 square kilometers, a significantly smaller area.

Borneo, shared by Indonesia, Malaysia, and Brunei, comes in third. It’s known for its ancient rainforests and diverse wildlife. Madagascar, off the coast of Africa, is fourth. It's famous for unique plant and animal life, including lemurs. Baffin Island, part of Canada, is fifth, characterized by Arctic tundra and rugged mountains.

Are These Islands Vulnerable to Change?

These large islands aren’t just about land area. They host diverse ecosystems and human populations. Sumatra, Indonesia, supports a large population and significant agricultural production. Honshu, Japan’s largest island, is a major economic and cultural hub. Victoria Island in Canada and Great Britain, part of the United Kingdom, also boast substantial populations and historical significance.

The islands listed face various challenges. Rising sea levels pose a threat to low-lying islands like the Bahamas and Iceland. Climate change impacts ecosystems and traditional ways of life. Greenland’s ice sheet is melting at an accelerating rate, contributing to global sea level rise. This has significant consequences for both the island's inhabitants and the world.

The future of these islands depends on global efforts to address climate change. Sustainable tourism and responsible resource management are crucial. Protecting biodiversity and supporting local communities are also essential. Understanding the unique characteristics of each island is key to preserving them for future generations.

Frequently Asked Questions

What makes Greenland so much larger than other islands? Greenland's massive size is due to its geological history and location. It separated from North America and Europe millions of years ago, forming a vast landmass covered by a thick ice sheet. This ice sheet contributes significantly to its overall area.

How is an island defined differently from a continent? Continents are generally defined by geological and tectonic plate boundaries. Islands are smaller landmasses completely surrounded by water, not connected to a continent. The distinction can sometimes be blurry, but size and geological formation are key factors.

What is the smallest island on this list? Newfoundland, at 108,860 square kilometers, is the 25th largest island on this list. It’s still a substantial landmass, but considerably smaller than Greenland or New Guinea.