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city in the North Ostrobothnia region, Finland
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Oulu ( OH-loo, Finnish: [ˈou̯lu] ⓘ; Swedish: Uleåborg [ʉːlɛɔˈbɔrj] ⓘ) is a major port city in Finland and the regional capital of North Ostrobothnia. It is located on the north-western coast of the country, at the mouth of the River Oulu. The population of Oulu is approximately 217,000, while the sub-region has a population of approximately 265,000. It is the 5th most populous municipality in Finland, and the fourth most populous urban area in the country. Oulu is also the most populous city in Northern Finland.
Oulu's neighbouring municipalities are: Hailuoto, Ii, Kempele, Liminka, Lumijoki, Muhos, Pudasjärvi, Tyrnävä and Utajärvi. Oulu is the third northernmost city in the world with a population of over 100,000, after Murmansk and Norilsk in Russia.
Due to its large population and geopolitical, economic and cultural-historical position, Oulu has been called the "capital of Northern Finland". Oulu is also considered one of Europe's "living labs", where residents experiment with new technologies (such as NFC tags and ubi-screens) on a community-wide scale. Although only in the top 2% of universities, the University of Oulu is regionally renowned in the field of information technology. Oulu has also been very successful in recent city image surveys; in a study published by the Finnish Economic Survey in 2008, Oulu received the best image rating among large cities in the country, including ratings from respondents in all provinces. In the 2023 T-Media survey, Oulu was tied with Kuopio as the second most attractive city in Finland, while Tampere was ranked first. In 2025, Oulu had the cleanest air quality among all European cities according to European Environment Agency (EEA).
Once known for wood tar and salmon, Oulu has become a major high-tech centre, particularly in IT and wellness technology. In 2024, Oulu placed third in the European Commission’s Capital of Innovation Awards (iCapital) in the Rising Innovative Cities category. Other important industries include wood processing, chemicals, pharmaceuticals, paper and steel.
Oulu has been selected as the European Capital of Culture for 2026 together with Trenčín, Slovakia.
The city is named after the river Oulujoki, which originates in the lake Oulujärvi. There have been a number of other theories for the origin of the name Oulu. One possible source is a word in the Sami language meaning 'flood water', but there are other suggestions. At minimum, the structure of the word requires that, if originally given by speakers of a Uralic language, the name must be a derivative. In all likelihood, it also predates Finnish settlement and is thus a loanword from one of the now-extinct Saami languages once spoken in the area.
The most probable theory is that the name derives from the Finnish dialectal word oulu, meaning "floodwater", which is related to e.g. Southern Sami åulo, meaning "melted snow", åulot meaning "thaw" (of unknown ultimate origin). Two other word families have also been speculated to be related. The first is seen in the Northern Savo dialectal word uula and its Sami counterpart oalli, both meaning "river channel". The second is the Uralic root reconstructed as *uwa, meaning "river bed" (reflected in modern Finnish vuo "flow", and its derivatives, such as vuolas "heavy-flowing"). To either of these roots, some Sami variety would have to be assumed having added further derivational suffixes.
Oulu is situated by the Gulf of Bothnia, at the mouth of river Oulujoki, which was an official trading centre.
Following the Treaty of Nöteborg in 1323, the status of Oulu was disputed in its ownership, as both the Novgorod Republic and the Kingdom of Sweden held much influence. In 1345, the Swedish annexed territory up to the Kemi River for the Diocese of Turku. In 1375, the Novgorodians built a defensive castle which was later captured by the Swedish forces in 1377.
The 1400s were characterized by Russian raids in the region, during these raids captured people would be killed and/or taken back to the region of Russia. In 1531, the city was granted permission to act as a trading post. In 1590, the Oulu Castle was built by the Swedes and in 1595, the Treaty of Teusina firmly established Sweden's control over Oulu.
The city was founded on 8 April 1605 by King Charles IX of Sweden, and granted city privileges in 1610. In 1765, Oulu received township rights granting them to trade outside of Sweden. Oulu was the capital of the Province of Oulu from 1776 to 2009.
In 1822, a major fire destroyed much of the city, especially the city centre as most of the city was made from wood. The architect Carl Ludvig Engel, chiefly known for the neoclassical (empire style) buildings around Helsinki Senate Square, was enlisted to provide the plan for its rebuilding. With minor changes, this plan remains the basis for the layout of Oulu's town center. The Oulu Cathedral was built in 1832 to his designs, with the spire being finished in 1844. During the Åland War, part of the Crimean War, Oulu's harbour was raided by the British fleet, who destroyed ships and burned tar houses, leading to international criticism.
The city was the site of the Battle of Oulu on 3 February 1918 between the Whites and the Reds during the Finnish Civil War.
Oulu is located in northern Finland, a considerable distance from the other major cities in the country. It is located 607 kilometres (377 mi) north of the capital city Helsinki. Mainland Finland's northernmost and southernmost points are roughly equidistant from Oulu.
Oulu's coast sits at the Bothnian Bay (Perämeri in Finnish) and the Swedish mainland is about 180 km directly west across the Bothnian Bay. From the center of Oulu in the direction of Oulunsalo, there is Kempeleenlahti, a smaller but wide, meadow-belted bay, and part of it has been listed as a nature conservation area. The nearby island Hailuoto is just off the coast, 53 kilometres (33 mi) away in the Bothnian Bay. Along the coast to the southwest, about 75 kilometres (47 mi) of Oulu is Raahe (Brahestad), known for its historic wooden town, and, further to the southwest, about 130 kilometres (81 mi) of Oulu is Kalajoki, known for its popular sandy beaches.
Oulu is divided into 106 city districts. The largest of these are Haukipudas, Oulunsalo, Kaakkuri, Ritaharju, Tuira, and Kello.
The municipality of Ylikiiminki was merged with the city of Oulu on 1 January 2009. Oulu and the municipalities of Haukipudas, Kiiminki, Oulunsalo, and Yli-Ii were merged on 1 January 2013.
Oulu has a subarctic climate (Köppen: Dfc, Trewartha Eolo), bordering a humid continental climate (Köppen: Dfb, Trewartha Dclo). It is the largest Finnish city entirely in this climatic zone as well as one of the largest such in the world. The typical features are cold and snowy winters with short and mild summers. Average annual temperature is 3.3 °C (37.9 °F). The average annual precipitation is 477 mm (18.78 in) falling 105 days per year, mostly in late summer and fall. The warmest temperature ever recorded in Oulu was 33.3 °C (91.9 °F) in July 1957, while the coldest temperature on record was −41.5 °C (−42.7 °F) in February 1966.
Due to Oulu's far northern location, and its frequent overcast skies, it only sees on average 15 minutes of sunshine per day in December. During the winter solstice days only last 3 hours and 34 minutes with the sun rising 1.9 degrees over the horizon. On the other hand, during the summer solstice days last 22 hours and 3 minutes, with the sun dipping 1 degree below the horizon. This gives Oulu white nights during the summer.
The core city centre of Oulu comprises approximately 14 city blocks, bounded by the City Hall to the north, the Plaanaoja stream to the east, Albertinkatu to the southwest, and Aleksanterinkatu to the northwest. During the 21st century, the city centre has undergone densification, and the pedestrian zone Rotuaari has been extended southwards along Kirkkokatu. A major project aimed at improving the quality of the urban environment was the renovation of Mannerheim Park in 2019.
Another central green area is Otto Karhi Park, which is crossed by the Plaanaoja stream running through the city centre. The park borders Hallituskatu, a major street that continues the commercial core of the city towards the district of Raksila and the railway station.
Historically, the city centre of Oulu was characterised by relatively low-rise buildings. From the 2010s onwards, several high-rise residential towers have been constructed in the area. In 2016, the Shopping centre Valkea was completed in the core of the city centre. In addition to approximately 60 retail units, the complex includes a Sokos department store and 66 residential apartments.
At the end of 2024, around 23,800 people lived in the central major district of Oulu, representing 11% of the city’s population.
The most significant current planning area is Raksila, located adjacent to the city centre, where a new transport and service hub is planned. The project includes a new bus terminal, commercial and office space, a hotel, and residential buildings. The Raksila area is also planned to include a multipurpose arena intended for sports and entertainment events, as well as a new hypermarket replacing the existing cluster of three grocery stores in the area.
Behind the main library, on Vänmanninsaari island, an 18-storey hotel tower is planned. The Oulu City Council approved the construction on 18 March 2024 and it is scheduled to begin in autumn 2026. The hotel is intended to address what has been considered an insufficient supply of hotel accommodation in the city. The plot has been reserved for a tower block since 1965, when the original plan for island was completed.
The city of Oulu has 217,469 inhabitants, making it the 5th most populous municipality in Finland. The Oulu region has a population of 265,454, making it the fourth largest region in Finland after Helsinki, Tampere and Turku. Oulu is home to 4% of Finland's population. 7% of the population has a foreign background, which is lower than in the major Finnish cities of Helsinki, Espoo, Tampere, Vantaa or Turku.
Oulu is the second largest monolingual Finnish-speaking municipality in Finland after Tampere. As of 2024, the majority of the population, 201,917 persons (92.8%), spoke Finnish as their first language. In addition, the number of Swedish speakers was 470 persons (0.2%) of the population. Foreign languages were spoken by 6.9% of the population. As English and Swedish are compulsory school subjects, functional bilingualism or trilingualism acquired through language studies is not uncommon.
At least 100 different languages are spoken in Oulu. The most common foreign languages are Russian (0.6%), Arabic (0.5%), English (0.5%), Chinese (0.4%) and Persian (0.3%).
As of 2024, 14,159 people with a foreign background lived in Oulu, or 7% of the population. There are 15,008 residents who were born abroad, which or 7% of the population. The number of foreign citizens in Oulu is 10,198. Most foreign-born citizens come from the former Soviet Union, Sweden, China, India, Iraq, Iran and Vietnam.
The relative share of immigrants in Oulu's population is below the national average. Nevertheless, the city's new residents are increasingly of foreign origin. This will increase the proportion of foreign residents in the coming years.
In 2023, the Evangelical Lutheran Church was the largest religious group with 67.2% of the population of Oulu. Other religious groups accounted for 1.9% of the population. 30.9% of the population had no religious affiliation.
Oulu, as well as other parts of North Ostrobothnia, is well known as a strong support area of the Conservative Laestadianism revival movement. A Laestadian background has been estimated to be common in construction sector management.
As of 31 December 2008, the active working population was employed as follows:
In 2011, the most important employers were:
Oulu has a diverse and active cultural scene, combining local traditions with contemporary and international influences. The city is known for its strong emphasis on music, festivals, and community-based cultural activities, and it has developed a reputation as one of the cultural centres of northern Finland.
One of Oulu's most internationally recognised cultural events is the Air Guitar World Championships, held annually in August since 1996. The event attracts participants and audiences from around the world and has become a symbol of the city's creative and unconventional cultural identity. Other notable cultural exports include the avant-garde performance group Mieskuoro Huutajat (Screaming Men) and the metal band Sentenced. The crime drama television series All the Sins (Kaikki synnit), filmed in the Oulu region between 2018 and 2021, has also contributed to the city's cultural visibility.
Music plays a central role in Oulu's cultural life. The city hosts numerous concerts and festivals throughout the year, covering genres such as rock, classical music, and jazz. Major annual events include the Oulu Music Video Festival in August, as well as the popular rock festival Qstock in July, one of the largest music festivals in Finland. The Oulu Music Festival takes place during the winter months, while the Oulunsalo Music Festival is held in summer. Additional recurring events include The Irish Festival of Oulu in October and the International Children's Film Festival in November.
The Madetoja Hall (Madetojan sali), completed in 1983, is home to the EU's northernmost professional symphony orchestra, Oulu Sinfonia. The hall is named after the composer Leevi Madetoja.
Oulu also offers a range of museums and cultural institutions. These include the Northern Ostrobothnia Museum, which presents regional history and culture; the Oulu Museum of Art (OMA), focusing on contemporary art; the science centre Tietomaa, one of the first science centres in Finland; and the Turkansaari Open-Air Museum, which showcases traditional rural life in the region.
Text from the Wikipedia article “Oulu”, available under CC BY-SA 4.0.