The flattest country in the world is the Maldives, where no natural point of land rises more than about 5 meters above sea level and the average elevation is just 1.5 meters. It is followed by other low-lying nations such as Tuvalu, Kiribati, the Marshall Islands, and Bangladesh, along with engineered lowlands like the Netherlands. Flatness is measured by maximum elevation, average elevation, or the share of land sitting below a chosen altitude, and the world's flattest places are overwhelmingly coral islands, river deltas, and reclaimed coastal plains.
When geographers talk about the "flattest" countries, they are not just describing a lack of mountains. They are describing nations whose entire existence is tied to a few meters of vertical room between dry land and the sea. For the island nations near the top of this list, that thin margin is not a curiosity but a matter of national survival.
How Flatness Is Measured
There is no single official ranking of the world's flattest countries, because "flat" can mean several different things. Geographers usually rely on one of three measures, and a country can rank differently depending on which one you choose:
- Maximum elevation: the height of the country's single highest natural point. By this measure, the Maldives and Tuvalu dominate, since their peaks are only a few meters above the waves.
- Average elevation: the mean height of all the land. This favors large flat nations like Bangladesh and the Netherlands, where vast areas sit close to sea level even if a few spots rise higher.
- Share of land below a threshold: the percentage of territory under, say, 10 meters or even below sea level. The Netherlands stands out here, with roughly a quarter of its land below the level of the sea.
Because of these different yardsticks, the list below mixes tiny coral atolls with major continental nations. What they share is a near-total absence of relief: in all of them, a modest hill becomes a regional landmark.
The Flattest Island Nations
The flattest countries on Earth are almost all coral islands and atolls in the Pacific and Indian Oceans. These are built on reefs rather than continental rock, so they rarely rise more than a handful of meters above the high-tide line.
- Maldives: The flattest country in the world. Spread across 1,192 coral islands in the Indian Ocean, it has a highest natural point of about 5.1 meters and an average elevation near 1.5 meters. More than 80 percent of its land sits less than one meter above sea level. You can read more in our guide to the flag of the Maldives.
- Tuvalu: A Polynesian nation of about 11,000 people whose highest point reaches only around 4.6 meters. Saltwater intrusion is already poisoning freshwater supplies and farmland.
- Marshall Islands: Made up of 29 coral atolls with an average elevation of roughly 2 meters and a highest point near 10 meters. Cold War nuclear testing at Bikini and Enewetak Atolls forced permanent evacuations that still shape the country today. See our flag of the Marshall Islands page for background.
- Kiribati: A scattered Pacific nation where most land lies below 3 meters. Its highest point, on the raised limestone island of Banaba, reaches 81 meters, but the rest of the country is razor-thin. The government has bought land in Fiji as a possible resettlement site. Our flag of Kiribati article explores its symbolism.
The Flattest Large Countries
Flatness is not limited to small islands. Some of the world's most populous and economically important nations are also remarkably low and level, usually because they sit on river deltas, sediment plains, or reclaimed coast.
- Bangladesh: The flattest large country on the planet. Built almost entirely on the combined delta of the Ganges, Brahmaputra, and Meghna rivers, it has an average elevation of about 85 meters but huge expanses near sea level. Roughly 30 million people live on land less than 10 meters above the ocean, making it acutely vulnerable to flooding and cyclones.
- Netherlands: The name literally means "low lands," and about 26 percent of the country lies below sea level, with the lowest point near -6.76 meters. Generations of dikes, dams, pumps, and polders have turned former seabed into farmland and cities. The Dutch like to say, "God made the world, but the Dutch made the Netherlands."
- Denmark: The flattest country in mainland Europe. Shaped by retreating ice-age glaciers, its terrain is a gentle plain with an average elevation around 31 meters. Its highest natural point, Mollehoj, reaches only about 170 meters and is so subtle that visitors often need GPS to find it.
- Qatar: A flat desert peninsula jutting into the Persian Gulf, with a highest point near 103 meters and an average elevation around 28 meters. Despite its featureless terrain, vast natural gas reserves have made it one of the world's wealthiest nations.
Why So Many Flat Countries Are Islands and Deltas
The geography behind these rankings is not random. Three landforms produce almost all of the world's flattest territory:
- Coral atolls: Rings of reef that grow only to about the height of the tide. As corals can build upward only as fast as sea level allows, atoll nations like Tuvalu and Kiribati are inherently low.
- River deltas: Where major rivers meet the sea, they drop millions of tonnes of silt, spreading out into broad, near-level plains. Bangladesh is the classic example, sitting on one of the largest deltas on Earth.
- Reclaimed and glaciated lowlands: Places like the Netherlands and Denmark were leveled by ice sheets or built up by human engineering, leaving little natural relief.
This is also why flatness and climate vulnerability go hand in hand. The same processes that create flat land leave it dangerously exposed to even small rises in sea level.
The Rising Sea Threat
For the lowest-lying nations, flatness is an existential issue. A sea-level rise of less than a meter, well within projections for this century, could submerge large portions of the Maldives, Tuvalu, Kiribati, and the Marshall Islands, or render them uninhabitable through flooding and the loss of freshwater.
These countries have responded in different ways. The Maldives has explored building artificial elevated islands and floating developments. Kiribati has purchased land abroad as insurance. Tuvalu has even begun creating a "digital nation" to preserve its statehood and culture if its physical territory is lost. Wealthier flat nations rely on engineering instead: the Netherlands maintains the most advanced flood-defense system on Earth, including the vast Delta Works storm-surge barriers.
Key Facts
- Flattest country: Maldives, with a highest natural point of about 5.1 meters
- Lowest average elevation: Maldives, around 1.5 meters above sea level
- Flattest large country: Bangladesh, on the Ganges-Brahmaputra-Meghna delta
- Most land below sea level: Netherlands, with about 26 percent below the sea
- Lowest point of any flat country: roughly -6.76 meters in the Netherlands
- People at risk in Bangladesh: about 30 million living under 10 meters elevation
- Dominant landforms: coral atolls, river deltas, and reclaimed coastal plains
Frequently Asked Questions
What is the flattest country in the world?
The Maldives is the flattest country in the world. No natural point in the country rises above roughly 5.1 meters, and the average elevation is only about 1.5 meters. More than 80 percent of its 1,192 coral islands sit less than a meter above sea level.
Which is the flattest large country?
Bangladesh is the flattest large country. Almost all of it lies on the delta of the Ganges, Brahmaputra, and Meghna rivers, leaving about 30 million people on land less than 10 meters above sea level and making the nation highly vulnerable to floods and cyclones.
How can the Netherlands be flat if it is below sea level?
About 26 percent of the Netherlands lies below sea level, with its lowest point near -6.76 meters. Centuries of dikes, dams, pumps, and drained polders have turned former seabed into usable land, protected today by one of the world's most sophisticated flood-defense systems.
Are flat countries in danger from climate change?
Yes. Low-lying island nations such as the Maldives, Tuvalu, Kiribati, and the Marshall Islands face possible submersion or loss of habitability from rising seas this century. Saltwater is already contaminating freshwater and farmland, prompting some governments to buy land abroad or build elevated and floating settlements.