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A panoramic view over the southernmost districts of Helsinki from Hotel Torni

City Europe

Helsinki

Helsinki is the capital city of Finland. It sits by the sea, with hundreds of islands. Ferries carry people to an old island fortress.

Helsinki is the capital of Finland, on a peninsula in the Gulf of Finland. Founded in 1550 and made the capital in 1812, it has white stone buildings, a sea fortress on islands, and the world's most northern metro. About 694,000 people lived there at the end of 2025.

Helsinki, founded by the Swedish king Gustav I Vasa in 1550 as Helsingfors and made capital of the Grand Duchy of Finland in 1812, is continental Europe's northernmost capital. About 70% of its area is sea, with 327 islands; it had 694,392 residents at the end of 2025 and is Finland's leading port.

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Photo: Ilkka Simomaa, CC BY-SA 3.0, via Wikimedia Commons

Discover Helsinki

Helsinki is the capital city of Finland.

It sits right by the sea. Lots of little islands lie off its coast. Many of its buildings are made of pale stone, so people call it the White City of the North.

Helsinki is the capital and largest city of Finland. It lies in the far south of the country, on a peninsula that pokes out into the Gulf of Finland, an arm of the Baltic Sea. About 694,000 people lived there at the end of 2025.

The sea is everywhere in Helsinki. About 70% of the city's area is water, with 327 islands and a shoreline 131 kilometers long. Many buildings are made of a light-colored local granite, which is why Helsinki is called the White City of the North. It is the most northern capital on the European mainland.

Helsinki lies in the far south of Finland on a peninsula fringed with natural harbors, projecting into the Gulf of Finland. Britannica calls it the most northerly of continental European capitals and notes the nickname White City of the North, from the light-colored local granite of many buildings. Statistics Finland counted 694,392 residents at the end of 2025.

The city's own statistics put about 70% of its area at sea, with 327 islands and a 131 km shoreline; almost 34% of the land is city-managed green space, and 80 conservation areas cover 1,622 ha. Helsinki is Finland's leading seaport and industrial city: more than half of the country's imports pass through its port. Finnish is the first language of about 75% of residents (2023), and some 21% speak a foreign language as their mother tongue, Russian being the most common.

Country
Finland (capital)
People (end of 2025)
694,392
Islands
327
Shoreline
131 km
A panoramic view over the southernmost districts of Helsinki from Hotel Torni
Photo: Ilkka Simomaa, CC BY-SA 3.0, via Wikimedia Commons

Famous places

Out in the sea is Suomenlinna, an old fort built on islands. Its thick stone walls are covered in grass.

In the city, a big cathedral stands above a wide square. Near the harbor, another cathedral has rounded domes.

Suomenlinna is a sea fortress spread over a group of islands at the entrance to Helsinki's harbor. Work on it began in 1748, when Finland was ruled by Sweden. Today about 800 people live there, and more than a million visitors come each year.

In the city center, Senate Square is surrounded by grand buildings designed by the architect Carl Ludvig Engel, including Helsinki Cathedral, completed in 1852. Near the waterfront rise the domes of Uspenski Cathedral, completed in 1868. The granite railway station of 1914 and the stadium built for the 1952 Olympic Games are famous too.

Suomenlinna (Sveaborg in Swedish, Viapori in Finnish) was begun in 1748 on the islands off the harbor as a maritime fortress and base for Sweden's Archipelago Fleet; UNESCO, which inscribed it in 1991, calls it an especially interesting example of 18th-century European military architecture. Besieged by Russian forces in 1808, its commandant surrendered after minor skirmishes, for reasons that remain unclear. About 800 people live there today.

After the 1808–09 war, the German-born architect Carl Ludvig Engel rebuilt the center in Neoclassical style between 1816 and 1840: the state council building, the university's main building and the Lutheran cathedral, known as the Great Church (completed 1852), frame Senate Square. Britannica calls the Uspenski Cathedral, completed in 1868, the largest Orthodox church in western Europe. Twentieth-century landmarks include Eliel Saarinen's railway station (1914), the Olympic Stadium for the 1952 Games, Alvar Aalto's concert building and the Central Library Oodi, which had almost 2.7 million visits in 2025.

Suomenlinna
sea fortress begun 1748; UNESCO 1991
Helsinki Cathedral
completed 1852
Uspenski Cathedral
completed 1868
Railway station
1914, by Eliel Saarinen
Suomenlinna, a fortress near Helsinki, Finland
Photo: Michal Pise, CC BY 2.0, via Wikimedia Commons

From Swedish port to Finnish capital

Long ago, a king of Sweden started a small town by the sea.

Later the town burned down, and people built it again. Then Helsinki became the capital of Finland. Today it is a busy city.

In 1550, King Gustav I Vasa of Sweden founded a trading town called Helsingfors at the mouth of the Vantaa River. In 1640 it moved about 5 kilometers south to its present site, closer to the open sea. The town suffered a plague in 1710 and burned in 1713, and in 1748 work began on the island fortress of Suomenlinna to protect it.

After a war between Russia and Sweden, Finland became part of the Russian Empire, and in 1812 Helsinki was made its capital. The center was rebuilt with grand buildings. In December 1917 Finland declared independence, and Helsinki became the capital of a new country.

King Gustav I Vasa founded Helsingfors in 1550 to compete in the Baltic trade with Reval (now Tallinn), across the Gulf of Finland. The first town stood at the mouth of the Vantaa River, about 4.8 km north of the present center, and moved to its current site in 1640 for better access to the sea. It became a naval base; a plague struck in 1710 and the town burned in 1713, and from 1748 the fortress of Sveaborg (Suomenlinna) made it more secure.

After the Russo-Swedish war of 1808–09 Finland was ceded to Russia, and in 1812 Tsar Alexander I moved the capital of the Grand Duchy of Finland from Turku to Helsinki, partly to reduce Swedish influence. The burned city was rebuilt under Engel, and the university moved from Turku in 1828. The population grew from 4,000 in 1810 to 56,000 in 1890 and over 100,000 in the 1900s. Finland declared independence in December 1917; a brief civil war followed, with fighting in Helsinki, and in 1919 the parliament elected the first president. After 1950 the economy boomed, and in the 1960s the population passed 500,000. The city hosted the Olympics in 1952.

A panoramic view over the southernmost districts of Helsinki from Hotel Torni
Photo: Ilkka Simomaa, CC BY-SA 3.0, via Wikimedia Commons

Through the years

Getting around Helsinki

In Helsinki, many people ride the metro.

Its trains run under the ground. Ferries sail across the water to the islands. Lots of people ride bikes too.

Helsinki's metro opened on August 2, 1982. It is the only metro in Finland and the most northern metro in the world. The city also has more than 2,000 kilometers of bicycle routes.

Because Helsinki is surrounded by sea, boats are part of everyday travel. A public ferry runs from Market Square to Suomenlinna all year round, even in winter, and the trip takes about 15 minutes. Big ships carry goods and passengers across the Baltic Sea, and more than half of everything Finland imports arrives through Helsinki's port.

The first motion to build a metro was made in 1955; trains carried passengers in rush hours from June 1, 1982, and President Mauno Koivisto officially opened the system on August 2, 1982. Finland's only metro, it is described as the world's most northern; it was built mainly to serve the eastern suburbs, and when it turned 30 in 2012 an extension west into Espoo was being planned. The city counts 2,214 km of bicycle routes.

Water transport is part of the public network: the HSL ferry from Market Square to Suomenlinna runs year-round, from early morning until late at night, with at least one departure an hour even in winter, and the crossing takes about fifteen minutes. Helsinki's economy rests on its harbors and on rail and road links to the interior; more than half of Finland's imports pass through its port, although most exports leave from other Finnish ports. Eliel Saarinen's railway station of 1914 remains the main rail terminal.

Metro opened
August 2, 1982
Ferry to Suomenlinna
about 15 minutes, all year
Bicycle routes
2,214 km

Weather and seasons

Winter in Helsinki is long and dark.

On the shortest day, the sun shines for only about six hours. Snow falls, and it gets cold. In summer, it can be warm and sunny.

Winter is the longest season in Finland. In the south, where Helsinki is, the shortest day of the year has only about six hours of daylight. About 600 millimeters of rain and snow fall in a year, and about a third of it comes as sleet or snow.

Warm air from the Atlantic, carried over the Baltic Sea, keeps Finland milder than places this far north in Siberia or Greenland. In 2025 Helsinki's warmest moment was 28.4 °C on July 12, and its coldest was −14.2 °C on January 4. Many people love winter swimming: the city has 20 winter swimming places.

Britannica notes that winter is Finland's longest season and that in southern Finland the shortest day lasts about six hours. Airflow warmed by the Baltic Sea and the Gulf Stream keeps Finnish temperatures as much as 10 degrees higher than at similar latitudes in Siberia and Greenland. Annual precipitation in the south is about 600 mm, roughly a third of it falling as sleet or snow.

The city's statistics give 2025's extremes as 28.4 °C on July 12 and −14.2 °C on January 4, and rate air quality in the center good or satisfactory about 97% of the hours. Sea and shore shape the way people enjoy the seasons: Helsinki has 36 beaches and 20 winter swimming places, along with 13 ice stadiums.

Shortest day in southern Finland
about 6 hours
Rain and snow in the south
about 600 mm a year, one-third as sleet or snow
2025 extremes in Helsinki
28.4 °C (July 12) and −14.2 °C (January 4)
Baltic Sea and Cloud
Photo: John Samuel, CC BY-SA 4.0, via Wikimedia Commons

Living in Helsinki

People in Helsinki love being outdoors.

They go to beaches and parks in summer. In winter, some even swim in icy water! The city has a very busy library where families read and play.

Nature is never far away in Helsinki. Almost a third of the city's land is green space, and people swim at 36 beaches in summer and at 20 winter swimming places in the cold months.

Helsinki loves books and music. The Central Library Oodi had almost 2.7 million visits in 2025. The city has theaters, an opera and ballet company, several orchestras and a big yearly Helsinki Festival. Most people speak Finnish as their first language, and about one in five has another mother tongue.

Most residents' first language is Finnish (75% in 2023), though Britannica notes that Finnish became dominant only over the 20th century; about 21% now speak a foreign language as their mother tongue, Russian speakers forming the largest group (21,540). The largest age group is people aged 30 to 34.

Helsinki has theaters, an opera and ballet company, several symphony orchestras and an annual Helsinki Festival; the University of Helsinki, moved from Turku in 1828, is among the largest in Scandinavia. Libraries are heavily used: 47 borrowing points made 10 million loans in 2025, and Oodi alone had almost 2.7 million visits. The city manages almost 34% of its land as green space and supports sport through 857 indoor facilities, 16 swimming halls and outdoor pools, 13 ice stadiums and 2,214 km of bike routes. Industry includes food, metal and chemical processing and the internationally known Arabia porcelain.

Suomenlinna, a fortress near Helsinki, Finland
Photo: Michal Pise, CC BY 2.0, via Wikimedia Commons

Helsinki on the map

Find Helsinki on the globe.

It is in Finland, far in the north of Europe. It sits by the sea. Lots of small islands are dotted around it.

Helsinki is at about 60 degrees north, in northern Europe. It sits on a peninsula on the south coast of Finland, facing the Gulf of Finland, part of the Baltic Sea.

Across the gulf to the south lies Tallinn, the capital of Estonia. Helsinki's coast is a maze of bays, harbors and 327 islands, and the sea fortress of Suomenlinna guards the way into the main harbor.

Helsinki lies at about 60.2° N and 24.9° E, the most northerly capital of continental Europe, on a peninsula with natural harbors in the Gulf of Finland. Reval (Tallinn), the Hanseatic city it was founded to rival, lies on the gulf's southern shore.

The original town stood about 4.8 km north at the mouth of the Vantaa River before moving to the peninsula in 1640. Sea makes up about 70% of the municipal area, with 327 islands and a 131 km shoreline; Suomenlinna occupies a group of small islands southeast of the center, at the entrance to the harbor.

Latitude
about 60.2° north
Longitude
about 24.9° east
Sea area
about 70% of the city
Across the gulf
Tallinn, Estonia

Amazing facts

  • Helsinki has more than 300 islands.

    Helsinki has 327 islands, and about 70% of the city's area is sea.

    Some 70% of Helsinki's area is sea; the city counts 327 islands and a 131 km shoreline.

  • Helsinki has the most northern metro in the world.

    Helsinki's metro, opened in 1982, is the only metro in Finland and the most northern in the world.

    Planned from 1955 and opened on August 2, 1982, Helsinki's metro is Finland's only subway system and described as the world's most northern.

  • Helsinki moved! The first town was a little farther north.

    Helsinki was first built at the mouth of the Vantaa River. In 1640 it moved about 5 kilometers south, closer to the open sea.

    The original Helsingfors stood about 4.8 km north of today's center; it was moved in 1640 for more open access to the sea.

  • About 800 people live inside an old island fort.

    About 800 people live on the islands of Suomenlinna, and more than a million visitors come each year.

    Suomenlinna has about 800 residents and up to 400 jobs, and in recent years over a million visitors a year.

  • Some people in Helsinki swim outside in winter.

    Helsinki has 20 winter swimming places, where people take a dip in icy water.

    Alongside 36 beaches, Helsinki maintains 20 winter swimming places and 13 ice stadiums.

Words to know

capital
the city where a country's government meets
peninsula
land with water on three sides
gulf
a large area of sea that reaches into the land
fortress
a strong building or group of buildings made to defend a place
granite
a hard, speckled rock often used for buildings
ferry
a boat that carries people, and sometimes cars, across water on a regular route
grand duchy
a land ruled by a grand duke; Finland was one under Russia from 1809 to 1917

Discovery challenge

  1. What is the old fort on Helsinki's islands called?

    What is the sea fortress on islands at the entrance to Helsinki's harbor called?

    Which fortress, begun by Sweden in 1748, became a UNESCO World Heritage Site in 1991?

    • Suomenlinna
    • Tallinn
    • Oodi
    Show the answer

    Suomenlinna

    Suomenlinna! A ferry takes people there.

    Suomenlinna, begun in 1748. Tallinn is a city across the gulf, and Oodi is Helsinki's big library.

    Suomenlinna (Sveaborg, Viapori), a maritime fortress and base for Sweden's Archipelago Fleet.

  2. Which country is Helsinki the capital of?

    Helsinki is the capital of which country?

    In 1812 Helsinki became the capital of which grand duchy?

    • Finland
    • Sweden
    • Norway
    Show the answer

    Finland

    Finland! Helsinki is its biggest city too.

    Finland. Sweden ruled the area when Helsinki was founded in 1550.

    The Grand Duchy of Finland, under Russia; Tsar Alexander I moved the capital there from Turku.

  3. How many hours of daylight are there on the shortest day near Helsinki?

    About how long does the shortest day last in southern Finland?

    According to Britannica, about how long is the shortest day in southern Finland?

    • About 6 hours
    • About 12 hours
    • About 20 hours
    Show the answer

    About 6 hours

    About 6 hours! Winter days are short and dark.

    About six hours. Winter is the longest season in Finland.

    About six hours; north of the Arctic Circle the polar night lasts more than 50 days.

  4. When did Helsinki's metro trains start?

    In which year did the Helsinki metro open?

    In which year did Finland's only metro open in Helsinki?

    • 1550
    • 1812
    • 1982
    Show the answer

    1982

    1982! It is the most northern metro in the world.

    1982. 1550 is when Helsinki was founded, and 1812 when it became the capital.

    August 2, 1982, opened by President Mauno Koivisto.

  5. Why is Helsinki called the White City of the North?

    Why is Helsinki nicknamed the White City of the North?

    What gives Helsinki its nickname, the White City of the North?

    • Many buildings are made of pale granite
    • It snows every day
    • All its boats are white
    Show the answer

    Many buildings are made of pale granite

    Its buildings are made of pale stone!

    Many buildings are made of a light-colored local granite.

    The light-colored local granite of many of its buildings, Britannica says.

Nearby places

Explore next

For parents & teachers

What children will learn

  • Locate Helsinki on a peninsula in the Gulf of Finland and describe how the sea shapes the city.
  • Explain how Helsinki changed from a Swedish trading town to the capital of Finland.
  • Describe how short winter days and the sea affect life in a northern city.
  • Name ways people travel in a city with many islands.

Recommended ages: 3 to 17 · About 15 minutes

Talk about it

  • About 70% of Helsinki's area is sea. How would living in a city full of water change your day?
  • On the shortest day in southern Finland, there are only about six hours of daylight. What would you do on a day like that?
  • Helsinki moved closer to the sea in 1640. Why might a town want to be closer to the sea?

Try at home or in class

  • With a flashlight and a globe or ball, show why days are shorter in winter far to the north.
  • Draw a coastline with bays and islands, put a fortress on the islands at the harbor mouth, and draw a ferry route to it.

Key vocabulary: capital, peninsula, gulf, fortress, granite, ferry, grand duchy

Where these facts come from

  1. Wikidata , Wikimedia Foundation (CC0 1.0)
  2. Natural Earth vector data , Natural Earth (NACIS) (Public domain)
  3. UNESCO World Heritage List , UNESCO World Heritage Centre (Linked as a reference; site facts come from Wikidata)
  4. Helsinki , Encyclopaedia Britannica
  5. Finland: introduction, land and climate , Encyclopaedia Britannica
  6. Helsinki Facts and Figures 2026 , City of Helsinki, Urban Research and Statistics
  7. History of the Fortress , Governing Body of Suomenlinna
  8. How to get to Suomenlinna , Governing Body of Suomenlinna
  9. Living in Suomenlinna , Governing Body of Suomenlinna
  10. Fortress of Suomenlinna , UNESCO World Heritage Centre
  11. Metro in Helsinki celebrates 30th birthday , Embassy of Finland (finlandabroad.fi)
  12. Wikimedia Commons , Wikimedia Foundation (Per file (public domain, CC0, CC BY or CC BY-SA); see each media record)

Checked, not yet human-reviewed. Last updated October 27, 2026. Spotted a mistake? Tell us.

Picture credits
  • Photo: Ilkka Simomaa, CC BY-SA 3.0, via Wikimedia Commons · source · license
  • Photo: Michal Pise, CC BY 2.0, via Wikimedia Commons · source · license
  • Photo: John Samuel, CC BY-SA 4.0, via Wikimedia Commons · source · license