Earth has peaks as high as 8,849 meters, but it also has countries where nearly all land sits just above sea level. In the era of climate change, that condition is no longer just a geographic fact, it is an existential threat. Here are 10 countries with the lowest average elevations in the world.
Note: Each entry includes two figures: mean elevation, which reflects the average height of all land areas, and highest point, the country’s maximum elevation.
1. Maldives (Mean elevation: 1.5 m | Highest point: 2.4 m)
The Maldives is the flattest country on Earth. This Indian Ocean nation consists of 26 atolls and 1,192 coral islands, with no hills and no highlands. Its highest point is just 2.4 meters above sea level.
As early as 1988, the Maldivian government warned that rising sea levels could submerge the entire country. Its economy depends on tourism and fisheries, two sectors directly threatened as coastlines continue to shrink.
2. Tuvalu (Mean elevation: 1.8 m | Highest point: 4.5 m)
Tuvalu is made up of three coral islands and six atolls in the Pacific, with a total land area of just 26 km². The land is so flat that from the center of the island, one can see up to six miles in every direction, more than half its total area.
Sea levels in the central Pacific are rising at an average of 3.9 mm per year, causing Tuvalu to lose land faster than natural sedimentation can replace it.
3. Kiribati (Mean elevation: 2 m | Highest point: 3 m)
Kiribati is spread across three island groups that straddle the International Date Line, making it one of the most geographically dispersed countries in the world.
In some areas, the land is only a few hundred meters wide, narrow enough that a single large wave can threaten it from both sides at once. Saltwater intrusion into freshwater supplies has become a routine crisis rather than an exceptional event.
4. Marshall Islands (Mean elevation: 2 m | Highest point: 10 m)
Since 1993, sea levels around the Marshall Islands have risen by more than 12 centimeters. Today, regular flooding inundates homes, farmland, roads, and even cemeteries. If sea levels rise by one meter, 40 percent of buildings in the capital, Majuro, could be permanently submerged.
This threat is compounded by history. Sixty seven U.S. nuclear tests conducted between 1946 and 1958 left lasting radioactive contamination, and the effects are still felt today.
5. Singapore (Mean elevation: 15 m | Highest point: 163 m)
Singapore’s highest point is far above the countries listed earlier, but most of its land lies close to sea level, which pulls the average down to 15 meters. With the second highest population density in the world, the risks are significant.
Singapore plans to spend at least 100 billion dollars over the next century on coastal protection and has become the first country in Southeast Asia to implement a carbon tax.
6. Qatar (Mean elevation: 28 m | Highest point: 103 m)
Qatar is dominated by rocky desert, with its lowest point, the Dukhan Sabkha salt flats, lying 7 meters below sea level. The country faces a dual threat, coastal flooding on one side, and extreme heat along with freshwater scarcity on the other.
Qatar has one of the highest per capita water consumption rates in the world, while almost all of its supply depends on desalination.
7. Netherlands (Mean elevation: 30 m | Highest point: 322 m)
An average elevation of 30 meters may seem safe, but it conceals the fact that one third of the Netherlands lies below sea level, much of it reclaimed over centuries.
The country has built an extensive system of dikes, canals, and pumps in response to its geography. The densely populated Rhine Meuse delta is the most vulnerable area, with millions of people living below sea level every day.
8. Denmark (Mean elevation: 34 m | Highest point: 170 m)
Denmark shares the same average elevation as Gambia at 34 meters, but its characteristics differ. Mainland Denmark is relatively secure, but islands such as Lolland and Falster, along with the west coast of Jutland, sit very low.
Coastal erosion along western Jutland has been ongoing for centuries, with an average of 1 to 2 meters of shoreline lost each year, a rate that is now accelerating due to increasingly intense North Sea storms.
9. Gambia (Mean elevation: 34 m | Highest point: 53 m)
Gambia is both the smallest and one of the flattest countries on mainland Africa. Its shape is distinctive, as it almost entirely surrounds the Gambia River, forming a narrow strip about 480 kilometers long within Senegal.
The wide and low river valley means that much of its agriculture depends directly on seasonal flooding patterns, which are becoming increasingly unpredictable due to climate change.
10. Estonia (Mean elevation: 61 m | Highest point: 318 m)
Estonia closes this list with the highest average elevation among the ten, but its Baltic coastline, stretching over 3,700 kilometers, is its main vulnerability.
Sea levels in the Baltic are rising by an average of 3 to 4 millimeters per year, and the combination of coastal erosion and land subsidence in southwestern Estonia has already forced the relocation of some infrastructure over the past decade.
