As of 2026, Ireland is the 20th largest island in the world, with a total area of 32,595 square miles (84,421 km²).
Is Ireland the 20th largest island in the world?
Yes, Ireland ranks as the 20th largest island globally by land area, at 32,595 square miles (84,421 km²).
It sits just ahead of Hokkaido in Japan and slightly behind Mindanao in the Philippines. The island’s political division between the Republic of Ireland and the United Kingdom hasn’t changed its standing in the rankings. Historically, Ireland’s moderate size and temperate climate made it a key player in North Atlantic trade and culture.
What are the top 20 largest islands?
The 20 largest islands in the world range from Greenland at 823,000 sq mi to New Guinea at 309,000 sq mi.
| Rank | Island | Area (sq mi) | Area (km²) | Countries |
| 1 | Greenland | 823,000 | 2,166,086 | Denmark |
| 2 | New Guinea | 309,000 | 800,000 | Indonesia, Papua New Guinea |
| 3 | Borneo | 280,000 | 748,168 | Indonesia, Malaysia, Brunei |
| 4 | Madagascar | 226,756 | 587,295 | Madagascar |
| 5 | Baffin Island | 195,928 | 507,451 | Canada |
| 6 | Sumatra | 171,069 | 443,066 | Indonesia |
| 7 | Honshu | 87,992 | 227,910 | Japan |
| 8 | Victoria Island | 83,897 | 217,291 | Canada |
| 9 | Great Britain | 80,823 | 209,331 | United Kingdom |
| 10 | Ellesmere Island | 75,767 | 196,236 | Canada |
| 11 | Celebes | 69,349 | 179,621 | Indonesia |
| 12 | South Island | 58,093 | 150,461 | New Zealand |
| 13 | Java | 53,589 | 138,794 | Indonesia |
| 14 | North Island | 44,258 | 114,626 | New Zealand |
| 15 | Luzon | 42,459 | 109,965 | Philippines |
| 16 | Newfoundland | 42,031 | 108,858 | Canada |
| 17 | Cuba | 40,369 | 104,556 | Cuba |
| 18 | Iceland | 39,682 | 102,775 | Iceland |
| 19 | Mindanao | 37,660 | 97,539 | Philippines |
| 20 | Ireland | 32,595 | 84,421 | Ireland, United Kingdom |
These rankings rely on total land area, though they can shift slightly based on coastal definitions and territorial disputes. For perspective, Ireland is roughly half the size of Madagascar, the fourth-largest island. Honestly, this is the best way to compare island sizes—just look at the raw numbers.
What is the 20th largest island in the United States?
The 20th largest island in the U.S. is Oahu, Hawaii, covering 1,545 km² (596 sq mi).
Oahu packs a lot into its small frame—it’s the third-most populous Hawaiian island and home to Honolulu, the state capital. Compared to Hawaii (the Big Island), which is nearly 11 times larger, Oahu feels almost cozy. Visitors flock here for the perfect mix of city life and natural wonders like Diamond Head and Hanauma Bay.
Which is bigger Australia or Greenland?
Australia is nearly four times larger than Greenland.
Australia stretches about 2.97 million square miles, while Greenland covers roughly 836,330 square miles. That’s why Australia gets continent status and Greenland remains an island. Blame the Mercator projection for making Greenland look way bigger than it is on most world maps—it’s a classic cartography trick that throws off our sense of scale.
What are the 5 largest islands in the world?
The five largest islands by area are Greenland, New Guinea, Borneo, Madagascar, and Baffin Island.
| Rank | Island | Area (sq mi) | Area (km²) |
| 1 | Greenland | 823,000 | 2,166,086 |
| 2 | New Guinea | 309,000 | 800,000 |
| 3 | Borneo | 280,000 | 748,168 |
| 4 | Madagascar | 226,756 | 587,295 |
| 5 | Baffin Island | 195,928 | 507,451 |
These giants dwarf most countries. Take Madagascar, for instance—it’s larger than France, Spain, and Sweden combined. That’s not just big; that’s continent-level territory.
Which is the smallest country in the world?
As of 2026, the smallest country in the world is Vatican City, with a land area of 0.49 km² (0.19 sq mi).
This tiny city-state sits entirely within Rome, Italy, and serves as the heart of the Catholic Church. Despite its size, it issues its own passports, prints currency, and stamps—proof that big things really do come in small packages.
What is the smallest island country in the world?
The smallest island country in the world is Nauru, covering just 21 km² (8.1 sq mi).
Nauru is a single-island nation in the Central Pacific and one of only three sovereign states smaller than 100 km². At one point, phosphate mining made it one of the richest countries per capita, but those reserves are nearly gone now. It’s a fascinating case study in how geography shapes a nation’s fate.
Is Australia a island?
Australia is classified as a continent, not a single island, due to its vast size and continental tectonic plate.
You’ll sometimes hear it called an “island continent” because it’s both a continent and surrounded by ocean. The key difference? Continents sit on massive tectonic plates, while islands are smaller landmasses surrounded by water. Greenland, for example, is the world’s largest island because it’s on a smaller plate.
Which country has the most islands in the world?
Sweden has the most islands of any country, with an estimated 221,800 islands.
According to the World Atlas, most of these are uninhabited and clustered in the Stockholm archipelago. Even Stockholm itself is built across 14 islands connected by over 50 bridges. Finland and Norway aren’t far behind, each with tens of thousands of islands.
Which US state has the most island?
Hawaii has the most islands among U.S. states, led by the island of Hawaii (the Big Island).
| Rank | Island Name | State |
| 1 | Hawaii (Big Island) | Hawaii |
| 2 | Kodiak Island | Alaska |
| 3 | Puerto Rico | Puerto Rico |
| 4 | Prince of Wales Island | Alaska |
| 5 | Chichagof Island | Alaska |
Alaska actually has more islands overall thanks to its archipelagos, but Hawaii stands out as both a state and a chain of eight major islands. Together, they form one of the most unique cultural and ecological regions in the Pacific.
How many islands does USA have?
The United States has over 18,000 islands, including territories and coastal formations.
That’s according to the U.S. Census Bureau. These islands stretch from the Aleutian chain in Alaska to the Florida Keys and the U.S. Virgin Islands. The count includes everything from tiny uninhabited rocks to major tourist destinations. Many play crucial roles in biodiversity and maritime navigation.
Is Kodiak island bigger than Hawaii?
Hawaii (the island) is larger than Kodiak Island, at 4,028 sq mi versus 3,588 sq mi.
Kodiak is still the second-largest island in the U.S. and the biggest in Alaska. It’s famous for its wild landscapes and massive brown bears. The Big Island of Hawaii, meanwhile, is the most volcanically active in the archipelago and keeps growing thanks to constant eruptions.
Is Australia or USA bigger?
The United States is approximately 27% larger than Australia by land area.
Australia covers about 7.7 million km², while the U.S. spans roughly 9.8 million km². Yet Australia has a much smaller population—around 26 million compared to the U.S.’s 335 million. That’s a great example of how land area doesn’t always match up with people or resources.
Why is Australia not an island?
Australia is not considered an island because it is classified as a continent on its own tectonic plate.
Islands are land surrounded by water that aren’t big enough to be continents. Australia’s size, geological structure, and position on the Indo-Australian Plate put it in a league of its own. Greenland, by contrast, sits on a smaller plate and earns its island title.
What country is the same size as Greenland?
No country is exactly the same size as Greenland, but Democratic Republic of the Congo is the closest major landmass in area.
Greenland covers about 2.17 million km². The DRC, at roughly 2.34 million km², is the closest match among nations. That whole “Greenland and Africa are similar” myth comes from the Mercator projection, which stretches polar regions way out of proportion. In reality, Africa is about 14 times larger than Greenland.
Edited and fact-checked by the MeridianFacts editorial team.