Island Size Comparison (Official Land Areas)
Which world island covers the most land area? Compare 12 official areas from Britannica geography data, from 145836 South Island to 2166086 Greenland.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Greenland Australia counts as continent. | 2,166,086 square kilometers | Largest island world | Britannica Greenland: 2,166,086 sq km |
| New Guinea Split PNG Indonesia. | 785,753 square kilometers | Second largest island | Britannica New Guinea: 785,753 sq km |
| Borneo Three nations share it. | 748,168 square kilometers | Third largest island | Britannica Borneo: 748,168 sq km |
| Madagascar Lemur home. | 587,041 square kilometers | Fourth largest island | Britannica Madagascar: 587,041 sq km |
| Baffin Island Largest Canada island. | 507,451 square kilometers | Canada Arctic giant | Britannica Baffin: 507,451 sq km |
| Sumatra Orangutan range. | 473,481 square kilometers | Indonesia Sunda island | Britannica Sumatra: 473,481 sq km |
| Honshu Tokyo Osaka spine. | 227,960 square kilometers | Japan main island | Britannica Honshu: 227,960 sq km |
| Victoria Island Split Nunavut NWT. | 217,291 square kilometers | Canada Arctic second | Britannica Victoria Island: 217,291 sq km |
| Great Britain Ninth largest here. | 209,331 square kilometers | UK main island | Britannica Great Britain: 209,331 sq km |
| Ellesmere Island Muskox range. | 196,236 square kilometers | Canada far north | Britannica Ellesmere: 196,236 sq km |
| Sulawesi K shape island. | 180,681 square kilometers | Indonesia orchid island | Britannica Sulawesi: 180,681 sq km |
| South Island NZ Smallest here. | 145,836 square kilometers | New Zealand south | Britannica South Island: 145,836 sq km |
About this converter
Island areas run from New Zealand South Island to Greenland at continental scale. South Island at 145836 square km opens. Sulawesi 180681, Ellesmere 196236, Great Britain 209331, Victoria Island 217291 and Honshu 227960 fill the middle hundreds. Sumatra 473481, Baffin 507451, Madagascar 587041, Borneo 748168 and New Guinea 785753 climb toward a million. Greenland at 2166086 closes nearly triple New Guinea. Australia stays out because geographers count it as a continent. Areas follow Britannica island profiles with UN figure cross-checks. Ice sheets count inside Greenland total.
How to use it
Pick two islands and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. One box holds a count of the first island, one holds the matching count of the second, one holds the area in the chosen unit. Try 1 Greenland against South Islands to see giant against floor.
Areas are land areas including inland water. Tidal and ice edge definitions shift small islands, not these giants.
FAQ
What is the largest island?
Greenland at 2,166,086 sq km.
Why is Australia missing?
Geographers count it as a continent.
How big is Great Britain?
209,331 sq km.
How big is Honshu?
227,960 sq km.
Sources
- Britannica island profiles (Greenland 2166086 to South Island 145836 sq km)
- UN Statistics Division land area tables (cross-checks for top 12)
- Natural Resources Canada Arctic island surveys (Baffin, Victoria, Ellesmere figures)
Last verified: 2026-10-05 · 12 entries
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