Kuopio is a Finnish city and municipality located in the region of Northern Savonia (Pohjois-Savo). It has a population of 120,246, which makes it the eighth-most populous city in Finland and the most populous city in Eastern Finland Province. At the end of 2018, the population of the city center of Kuopio was 89,307. Kuopio has a total area of 4,326.35 square kilometres (1,670.41 sq mi), of which 719.85 km2 (277.94 sq mi) is water and half is forest. Though the city's population is a spread-out 75/km² (190/sq mi), the city's urban areas are populated comparably densely (urban area: 1,618 /km²), making Kuopio Finland's second-most densely populated city. With the city of Joensuu, Kuopio is one of major urbans, economic, and cultural hubs for Eastern Finland.

Kuopio is known nationwide as one of the most important study cities and centers of attraction and growth, but on the other hand, the history of Kuopio has been characterized by several municipality mergers since 1969, as a result of which Kuopio now includes many countryside; Kuopio's population surpassed 100,000 when the town of Nilsiä joined the city at the beginning of 2013, and when Maaninka joined Kuopio at the beginning of 2015, Kuopio became Finland's largest milk producer community and Finland's second largest beef producer community. In addition, at the end of the 2010s, Kuopio was marked by numerous large projects, which are the largest in the city nationwide immediately after the Helsinki's metropolitan area. With the large tourist center in Tahkovuori, Kuopio has also grown into a major tourist city. Kuopio Airport, located in the Siilinjärvi municipality that almost surrounded by Kuopio, is Finland's fifth-busiest airport, with over 235,000 passengers in 2017.

According to Kuntarating 2017 survey, Kuopio has the most satisfied residents among the 20 largest cities, and according to the 2018 survey, Kuopio is the best city for real estate investors. In the Kuntien imago 2018 survey, Kuopio ranks second among large cities of Finland after Seinäjoki of South Ostrobothnia.

Kuopio is the current European Region of Gastronomy. It is also known as home of Kalakukko, a traditional food of Savonia.

The city is surrounded by Lake Kallavesi, and several parts of it are built on islands. With an area of 472.76 square kilometres (182.53 sq mi) Lake Kallavesi is the tenth largest lake in Finland. In the wake of the Yoldia Sea, which followed the Weichselian glaciation and preceded the Baltic Sea, there are ancient beaches up to 140 m above the current sea level, of which the current Lake Kallavesi is 82 m above sea level. Kuopio's ample waterfronts and islands are also used in the Saaristokaupunki (lit. Archipelago city) -project, the biggest residential area currently being built in Finland. Saaristokaupunki will accommodate a total of 14,000 inhabitants in 2015. All houses will be situated no more than 500 metres (1,600 ft) from the nearest lakeshore.

Kuopio Market Square is the undisputed center of the city and the city center follows a densely built grid pattern with several parks and narrow gutter streets. The environment of the city is quite distinctive; the surface shapes of the waterfront-lined center are so variable that a flat property is a desired rarity. The settlement has spread outside the center of Kuopio according to a dense and sparse finger model that is affordable for public transport, and the new districts have been built in a municipal drive at once; for example, the Saaristokaupunki was banned for building for the previous 25 years, and this Kuopio zoning tradition has a long history. Due to the above-mentioned factors, the population density of the Kuopio city center is the highest in Finland.

With the surrounding lakes, the shoreline in Kuopio is 4,760 kilometers. The terrain is also characterized by rich forests, and the clear center of the Kuopio's lund forest is mainly located in the area between Kuopio, Nilsiä and Siilinjärvi. Of the Finnish municipalities, Kuopio has the second largest number of summer cottages and holiday homes. In 2013, the number of summer cottages was 8,684. The number of summer homes in Kuopio has increased in recent years due to municipal associations. Due to the abundance of water bodies, Kuopio also has a remarkably favorable climate compared to the latitude. The annual sum of the effective temperature is about as high in Kuopio as in places further south than, for example, Tampere and Lahti.