Biggest Glacier in Iceland (2026 Data)

The biggest glacier in Iceland is Vatnajökull - 7,720 km2 of ice at the last full survey in 20197,720 km2¹, making it the largest ice cap in Europe by volume. It is not a lone giant but the head of a family: 269 glaciers² were counted in the national inventory, from Vatnajökull's continental-scale dome down to Okjökull, which melted so completely that Iceland held a funeral for it in 2019¹.

Iceland's ice is shrinking on every scale this page can measure. The glaciers covered about 10,400 km2¹ in 2019 - 10.1% of the country - down 2,200 km2¹ from the end of the 19th century. Below: every big glacier sized and compared, the retreat quantified glacier by glacier, and the answers to the whole superlatives cluster this search family asks - biggest lake, church, stadium, crater and the rest.

How many glaciers in Iceland?

Iceland has 269 glaciers², per the national inventory compiled around the year 2000. The number is a moving target: small glaciers keep slipping below the ice that defines them. Beyond the famous fourteen, the Tröllaskagi peninsula in northern Iceland alone carries more than 170³ small cirque glaciers and glacier remnants³.

The inventory counts anything that still moves as ice: ice caps, outlet glaciers, valley and cirque glaciers, and remnants. Okjökull in the west lost that status - after shrinking 99% from its maximum, what remained by 2019 was 0.07 km2¹ of stagnant ice, and scientists declared it dead in 2014¹. Its bronze memorial plaque, "A letter to the future", was the first funeral for a glacier anywhere in the world.

What is the biggest glacier in Iceland?

Vatnajökull - literally "water glacier" - is Vatnajokull at 7,720 km2¹ (2019), covering about 7.5%¹ of the entire country by itself. By volume it is Europe's largest ice cap: roughly 3,000 km3³ of ice, up to 950 m thick, burying seven active volcanic systems including Grímsvötn, Iceland's most frequent erupter³.

The scale is hard to hold in the head. Vatnajökull is bigger than the entire country of Puerto Rico. Its largest outlet glacier, Brúarjökull, alone covers 1,600 km2¹ - more than the second-place Langjökull and third-place Hofsjökull combined. All of Iceland's other 268 glaciers could fit inside Vatnajökull with room to spare.

Iceland glacier coverage percentage: one tenth of the country

For readers asking how much of Iceland is covered by ice: glaciers covered 10.1%¹ of the country in 2019 - about 10,400 km2¹ of the country's 103,125 km2. A generation ago the share was 11%³ (2008), and in the 1890s the ice began from a base 2,200 km2¹ larger than today's total.

The donut chart above puts the ratio in one glance: for every square kilometre of ice there are nine of fire, sand and green moss. But the ratio is drifting - the coverage percentage is falling by roughly a full percentage point per generation, and the trend line in the next section shows the projection crossing below 10,000 km2¹ within the coming decade¹.

The retreat, glacier by glacier

No glacier in the measured set gained area. The published losses from each glacier's maximum run from 12%¹ (Vatnajökull) to 99%¹ (Okjökull), and the smaller the glacier, the faster the relative decline: Torfajökull and Snæfellsjökull have lost nearly two-thirds of their maximum area, while Þrándarjökull in the east is down 59%¹¹.

Big numbers hide in percentages. Vatnajökull's modest-sounding 12% loss equals 606 km2¹ - an area larger than Malta. Hofsjökull's 22% equals 138 km2¹, about twice the size of Manhattan. This is the arithmetic of the climate crisis in miniature: the giants lose slowly in relative terms and enormously in absolute ones, while the small glaciers are simply going¹. Glaciologists expect the smallest cirque glaciers of the north to disappear entirely within decades, which will push the 269-glacier count steadily downward even as the big caps remain too large to vanish on any human timescale³.

Ice caves and the national parks

How many national parks are there in Iceland? Three - and the newest wraps the biggest glacier. How many ice caves are in Iceland? No official count exists - the glaciers form and destroy caves every season. Operators run tours into dozens of them, and two are visitable year-round: the Katla Ice Cave under Mýrdalsjökull's Kötlujökull outlet - described by operators as the largest accessible naturally formed ice cave in the country - and the Crystal Cave in Vatnajökull⁴. The rest are winter-only, because summer melt reopens the plumbing.

Asked how much ice in Iceland there actually is, the answer has two dimensions: the 10,400 km2³ of area covered above, and the volume - roughly 3,000 cubic kilometres³ of ice, enough that if it all melted, global sea level would rise about a centimetre on its own. Volume is the more fragile of the two numbers: thinning hits the whole surface at once, so the ice is losing depth even where its outline barely changes from year to year³.

Vatnajökull is also the core of its namesake national park, established 2008⁵ and inscribed by UNESCO in 2019⁵ - one of the largest national parks in Europe, wrapping the ice cap plus Skaftafell and Jökulsárgljúfur. Iceland's three national parks (Þingvellir 1930, Snæfellsjökull 2001, Vatnajökull 2008) together protect much of the country's most visited terrain, and two of the three are UNESCO World Heritage Sites⁵.

The biggest of everything: the landmark superlatives

This search family also asks after Iceland's other biggest things, so here they are, measured and sourced: The biggest lake in Iceland is Þórisvatn⁶ at 88 km2⁶, a reservoir on the Þjórsá - which is itself the biggest river in Iceland at 230 km⁶. The biggest church in Iceland is Hallgrímskirkja in Reykjavik at 74.5 m⁶, still the city's tallest structure. The biggest stadium is the national Laugardalsvöllur, seating 15,000⁶ - a reminder that the whole country has fewer people than many single stadiums hold on a derby day⁶.

Fire under the ice

The reason a glacier grows this big here is the same reason it is dangerous: Vatnajökull sits on the volcanic hotspot. Seven volcanic systems lie under the ice, including Grímsvötn - Iceland's most frequently erupting volcano - and Bárðarbunga, whose 2014-15 Holuhraun eruption melted through the glacier margin³. Subglacial eruptions punch through hundreds of metres of ice as steam explosions, and meltwater gathers in Grímsvötn's caldera lake until it bursts out as a jokulhlaup, a glacial flood that can carry icebergs the size of buildings across the Sandur plains at highway speed³.

The ice also remembers the climate. The current maximum extent dates from the Little Ice Age, which squeezed Icelandic farms from the 15th century until about 1900; the glaciers have been retreating, with brief surge-driven pauses, ever since¹. Farms abandoned under the advancing ice of the 1700s have been re-exposed, stone by stone, by the retreat of the last century. Reading the glacier is reading the country's agricultural history in reverse. The same ice that once buried the farms now feeds the rivers that power the country: glacial rivers drive a large share of Iceland's hydroelectric turbines, which is why the retreat shows up not just in photographs but in the national energy accounts - a connection few visitors make between the ice they photograph and the electricity their hotel room runs on¹. The bitter irony is that the glaciers here are both a power source and a casualty: the water they release is renewable, but the ice producing it is not - once a glacier like Okjokull is gone, no grid contract brings it back.

Seeing the glacier: ice caves, tongue walks and the ring road

Tourism has grown around the ice as fast as the ice has shrunk. Skaftafell, once a national park in its own right, is now the busiest gateway of Vatnajökull National Park, where the Svínafellsjökull tongue lets walkers stand on the ice an hour from the car park. Sólheimajökull on the south coast markets its retreat itself - lagoon photographs from 2010 beside today's shoreline tell the story without a single graph. Ice-cave season runs from November to March for most caves, with the two year-round sites under Katla and in Vatnajökull covering the summer⁴.

The practical arithmetic for a traveller: a glacier walk runs a few hours, an ice-cave tour half a day, and the Jökulsárlón glacier lagoon - where Breiðamerkurjökull's ice calves into tidal water - is free to watch from the shore at any hour. The lagoon did not exist before about 1935; it is the retreat, made visible, filling with seals and tour boats³.

The superlative sweep: biggest of the rest

Iceland's superlatives extend well beyond glaciers, and this search family asks for all of them. Here is the complete rundown, each answer tied to its measurement:

1. The biggest ice cave in Iceland is currently the Katla Ice Cave under Myrdalsjokull's Kotlujoekull outlet - operators describe it as the largest accessible naturally formed ice cave in the country, and unlike most caves it runs tours all year⁴.
2. The biggest stadium in Iceland is the national Laugardalsvöllur in Reykjavik, seating 15,000⁶ spectators - roughly one seat for every 26 Icelanders⁶.
3. The biggest indoor arena in Iceland is Laugardalshöll in Reykjavik, the country's main concert and indoor-sports hall; Iceland built no dedicated arena of the continental scale, and touring acts play either the hall or the stadium in summer⁶.
4. The biggest football club in Iceland by honours is KR Reykjavik, the oldest club in the country and its most successful across the domestic league's century of play⁶.
5. The biggest building in Iceland is generally counted as the Smaralind shopping centre in Kópavogur or, by enclosed volume, the University of Iceland'sasketta complex - Iceland simply does not build enormous single structures; its tallest point, Hallgrimskirkja at 74.5 m⁶, is a church⁶.
6. The biggest crater in Iceland is the Askja caldera in the highlands, about 8 km⁶ across, holding the deep lake Oskjuvatn; the photogenic Kerid crater is far smaller but far easier to reach from Reykjavik⁶.
7. How many black sand beaches in Iceland? There is no official register - the basalt coast produces them continuously - but a handful are famous enough to have names: Reynisfjara near Vik, Solheimasandur with its plane wreck, and Stokksnes below Vestrahorn⁶.
8. For the Iceland number of UNESCO world heritage sites question, the answer is three⁵: Þingvellir (2004), the island of Surtsey (2008) and Vatnajökull National Park (2019)⁵.
9. The biggest ski resort in Iceland is Hlíðarfjall above Akureyri in the north, with Bláfjöll outside Reykjavik as the capital's own slope - both dwarfed, in vertical metres, by the glaciers themselves, which offer summer skiing on Tonga... on Langjokull's snowfields in good years⁶.

Conclusions

1. Vatnajökull reigns at 7,720 km2¹ (2019) - and by volume the largest ice cap in Europe, hiding seven active volcanoes under its dome³.
2. Iceland has 269 glaciers², but the ice is concentrated: four ice caps hold 95% of the national glacier area, and Vatnajökull alone holds about three quarters¹.
3. The retreat is universal and accelerating: every measured glacier is smaller than its maximum, the national total is down 2,200 km2¹ since the 1890s, and the projection crosses 10,000 km2 before 2040¹.
4. Small glaciers die first - Okjökull lost 99% of its ice and its glacier status, a rehearsal for what the 45-65% losses at Snæfellsjökull, Torfajökull and Þrándarjökull imply within decades¹.
5. The ice is the tourism: the national park named for Vatnajökull is a UNESCO site, the ice caves under Mýrdalsjökull run year-round tours, and the glacier views sell the ring road - meaning the retreat is an economic story, not only a scientific one⁵.
6. Measure the superlatives while they last: the inventory is a snapshot, Okjökull has already left the list of true glaciers, and the projection has the national total crossing below 10,000 km2 within the coming decade - today's charts are the high side of the icy future¹.