Sweden

The name for Sweden is generally agreed to derive from the Proto-Indo-European root *s(w)e, meaning 'one's own', referring to one's own tribe from the tribal period. The native Swedish name, Sverige (a compound of the words Svea and rike, first recorded in the cognate Swēorice in Beowulf), translates as "realm of the Swedes", which excluded the Geats in Götaland.

The contemporary English variation was derived in the 17th century from Middle Dutch and Middle Low German. As early as 1287, references are found in Middle Dutch referring to a lande van sweden ("land of [the] Swedes"), with swede as the singular form. In Old English the country was known as Swéoland or Swíoríce, and in Early Modern English as Swedeland. Some Finnic languages, such as Finnish and Estonian, use the terms Ruotsi and Rootsi; these variations refer to the Rus' people who inhabited the coastal areas of Roslagen in Uppland and who gave their name to Russia.

=== Prehistory ===

Sweden's prehistory begins in the Allerød oscillation, a warm period around 12,000 BC, with Late Palaeolithic reindeer-hunting camps of the Bromme culture at the edge of the ice in what is now the country's southernmost province, Scania. This period was characterised by small clans of hunter-gatherers who relied on flint technology.

Sweden and its people were first described by the Roman historian Publius Cornelius Tacitus in his Germania (98 AD). In Germania 44 and 45 he mentions the Swedes (Suiones) as a powerful tribe with ships that had a prow at each end (longships). Which kings (*kuningaz) ruled these Suiones is unknown, but Norse mythology presents a long line of legendary and semi-legendary kings going back to the last centuries BC. The runic script was in use among the south Scandinavian elite by at least the second century AD, but all that has survived from the Roman Period is curt inscriptions demonstrating that the people of south Scandinavia spoke Proto-Norse at the time, a language ancestral to Swedish and other North Germanic languages.

In the sixth century, the Byzantine historian Jordanes names two tribes living in Scandza, both of which are now considered to be synonymous with the Swedes: the Suetidi and Suehans. The Suehans were known to the Roman world as suppliers of black fox skins and, according to Jordanes, had very fine horses, similar to those of the Thyringi of Germania ("alia vero gens ibi moratur Suehans, quae velud Thyringi equis utuntur eximiis").

The Swedish Viking Age lasted roughly from the eighth century to the 11th century. It is believed that Swedish Vikings and Gutar mainly travelled east and south, going to Finland, Estonia, the Baltic countries, Russia, Belarus, Ukraine, the Black Sea and even as far as Baghdad. Their routes passed through the Dnieper south to Constantinople, on which they carried out numerous raids. The Byzantine emperor Theophilos noticed their great skills in war and invited them to serve as his personal bodyguard, known as the Varangian Guard. The Swedish Vikings, called Rus, are believed to be the founders of Kievan Rus'. The Vikings were described by many outside sources, such as the Arab traveller Ibn Fadlan. The actions of these Swedish Vikings are commemorated on many runestones in Sweden, such as the Greece runestones and the Varangian runestones. There was also considerable participation in expeditions westwards, which are commemorated on stones such as the England runestones. The last major Swedish Viking expedition appears to have been the ill-fated expedition of Ingvar the Far-Travelled to Serkland, the region south-east of the Caspian Sea. Its members are commemorated on the Ingvar runestones, none of which mentions any survivor.

During the early stages of the Viking Age, a centre of trade in Northern Europe developed at Birka on the island of Björkö, not far from where Stockholm was later constructed, in mid-latitude Sweden. Birka was founded around 750 AD as a trading port by a king or merchants trying to control trade. Birka was the Baltic link in the Dnieper trade route through Ladoga (Aldeigja) and Novgorod (Holmsgard) to the Byzantine Empire and the Abbasid Caliphate. It was abandoned around 975, at about the same time Sigtuna was founded as a town some 35 km to the northeast. It has been estimated that the population in Viking Age Birka was between 500 and 1000 people. Archaeological finds indicate that Birka still was wealthy in the 9th and 10th centuries. Thousands of graves, coins, jewellery and other luxury items have been found there.

The exact age of the kingdom of Sweden is unknown. Determining its age depends mostly on whether Sweden is considered a nation when the Svear (Swedes) ruled Svealand or when the Svear and the Götar (Geats) of Götaland were united under a single ruler. Svealand was described by Tacitus in 98 AD as being under a single ruler, though it is unknown how long this had been the case. The epic poem Beowulf describes semi-legendary Swedish-Geatish wars in the sixth century.

However, historians typically start the line of Swedish monarchs from when Svealand and Götaland were ruled under the same king, namely Erik the Victorious and his son Olof Skötkonung in the tenth century. These events are often described as the consolidation of Sweden, although substantial areas were conquered and incorporated later. In this context, "Götaland" primarily refers to the provinces of Östergötland and Västergötland. Småland was of little interest at the time due to its deep pine forests, with only the city of Kalmar and its castle holding any significant importance. There were also Swedish settlements along the southern coastline of Norrland, one of the four lands of Sweden.

Saint Ansgar is traditionally credited with introducing Christianity to Sweden in 829, but the new religion did not begin to fully replace paganism until the 12th century. During that century, Sweden was undergoing dynastic struggles between the Erik and Sverker clans. The conflict ended when a third clan married into the Erik clan, founding the Bjälbo dynasty, which gradually consolidated Sweden into a stronger state. According to the Legend of Saint Erik and the Erik's Chronicle, Swedish kings conducted a series of Crusades to pagan Finland and started conflicts with the Rus', who by then had no further connections with Sweden. As a result of the Crusades, mostly with the Second Swedish Crusade led by Birger Jarl Finland gradually became part of the kingdom of Sweden and the sphere of influence of the Catholic Church. The Swedes built fortresses in Tavastland and Åbo, while a Swedish royal council was instituted, an administrative structure and fiscal apparatus was created, and law codes were codified during the reigns of Magnus Ladulås (1275–1290) and Magnus Eriksson (1319–1364). As a result, the Finnish lands were firmly integrated into the Swedish realm.

Except for the provinces of Scania, Blekinge, and Halland in the southwest of the Scandinavian peninsula, which were part of the Kingdom of Denmark during this period, feudalism never developed in Sweden as it did in much of Europe. As a result, the peasantry remained largely a class of free farmers throughout most of Swedish history. Slavery, also known as thralldom, was not common in Sweden, and the institution gradually diminished due to the spread of Christianity, the difficulty of obtaining slaves from lands east of the Baltic Sea, and by the development of cities before the 16th century. Indeed, both slavery and serfdom were abolished altogether by a decree of King Magnus Eriksson in 1335. Sweden remained a poor and economically underdeveloped country, where barter was the primary means of exchange.

In 1319, Sweden and Norway were united in a personal union under King Magnus Eriksson, the grandson of King Magnus Ladulås of Sweden and of King Haakon V of Norway. Magnus Eriksson also ruled Scania from 1332 to 1360. In the mid-14th century, Sweden was struck by the Black Death. The population of Sweden and most of Europe was decimated. The population did not reach its pre-1348 levels until the beginning of the 19th century, with one third of the population dying between 1349 and 1351. During this period, the cities began to acquire greater rights and were heavily influenced by German merchants of the Hanseatic League, active especially at Visby. In 1397, Queen Margaret I of Denmark (the former daughter-in-law of Magnus Eriksson) established the personal union of Sweden, Norway, and Denmark through the Kalmar Union. However, Margaret's successors, whose rule was centred in Denmark, were unable to control the Swedish nobility.

In 1520, King Christian II of Denmark, who attempted to restore the Union of Kalmar through military force, ordered the massacre of Swedish nobles in Stockholm, an event known as the "Stockholm Bloodbath." This atrocity incited the Swedish nobility to renew their resistance, and on 6 June 1523 (now celebrated as Sweden's National Day), they made Gustav Vasa their king. This is sometimes considered as the foundation of modern Sweden. Shortly afterwards the new king rejected Catholicism and led Sweden into the Protestant Reformation. The term riksdag was used for the first time in the 1540s, although the first meeting where representatives of different social groups were called to discuss and determine affairs affecting the country as a whole took place as early as 1435, in the town of Arboga. During the Riksdag assemblies of 1527 and 1544, under King Gustav Vasa, representatives of all four estates of the realm (clergy, nobility, townsmen and peasants) were called on to participate for the first time. The monarchy became hereditary in 1544. When Gustav Vasa broke the monopoly power of the Hanseatic League, he was regarded as a hero by the Swedish people. Furthermore, when Sweden became more developed, after breaking the trade monopoly of the Hanseatic League, and entered its golden age, the fact that the peasantry had traditionally been free meant that a greater share of the economic benefits went to them rather than to a feudal landowning class.

The end of the 16th century was marked by a final phase of rivalry between the remaining Catholics and the new Protestant communities. In 1592, Gustav Vasa's Catholic grandson and king of Poland, Sigismund, ascended the Swedish throne. He pursued to strengthen Rome's influence by initiating Counter-Reformation and created a dual monarchy that temporarily became known as the Polish-Swedish Union. His despotic rule, strongly characterised by intolerance towards the Protestants, sparked a civil war that plunged Sweden into poverty. In opposition, Sigismund's uncle and successor, Charles Vasa, summoned the Uppsala Synod in 1593 which officially confirmed the modern Church of Sweden as Lutheran. Following his deposition in 1599, Sigismund attempted to reclaim the throne sparing no expense, and hostilities between Poland and Sweden continued for the next hundred years.

Sweden rose to prominence on a continental scale during the reign of king Gustavus Adolphus (1611-1632), seizing territories from Russia and the Polish–Lithuanian Commonwealth in multiple conflicts. During the Thirty Years' War, Sweden conquered approximately half of the Holy Roman states and defeated the Imperial army at the Battle of Breitenfeld in 1631. Gustavus Adolphus planned to become the new Holy Roman Emperor, ruling over a united Scandinavia and the Holy Roman states, but he was killed at the Battle of Lützen in 1632. After the Battle of Nördlingen in 1634 – Sweden's only significant military defeat of the war – pro-Swedish sentiment among the German states faded. These German provinces broke away from Swedish power one by one, leaving Sweden with only a few northern German territories: Swedish Pomerania, Bremen-Verden and Wismar. From 1643 to 1645, during the last years of the war, Sweden and Denmark-Norway fought the Torstenson War. The result of that conflict and the conclusion of the Thirty Years' War helped establish postwar Sweden as a major force in Europe. The Peace of Westphalia in 1648 granted Sweden territories in northern Germany.

In the middle of the 17th century, Sweden was the third-largest country in Europe by land area. Sweden reached its largest territorial extent under the rule of Charles X after the treaty of Roskilde in 1658, following Charles X's crossing of the Danish Belts. The foundation of Sweden's success during this period is credited to Gustav I's major changes to the Swedish economy in the 16th century, and his introduction of Protestantism. One-third of the Finnish population died in the devastating Great Famine of 1695–1697 that struck the country. Famine also hit Sweden, killing roughly 10% of Sweden's population.

In the 17th century, Sweden was engaged in many wars, for example with Poland–Lithuania, with both sides competing for territories of today's Baltic states. The Polish–Swedish War (1626–1629) ended with a ceasefire in Stary Targ (Truce of Altmark) on 26 September 1629 that was in favour of the Swedes, to whom Poland ceded the larger part of Livonia together with its important port of Riga. The Swedes also gained the right to tax Poland’s Baltic trade (3.5% on the value of goods), and kept control of several cities in Royal Prussia and Ducal Prussia (including Pillau (Baltiysk), Memel (Klaipėda) and Elbing (Elbląg)). The Swedes later conducted a series of invasions into the Polish–Lithuanian Commonwealth, known as the Deluge. After more than half a century of almost constant warfare, the Swedish economy had deteriorated. It became the lifetime task of Charles X's son, Charles XI, to rebuild the economy and refit the army. His legacy to his son, the coming ruler of Sweden, Charles XII, was one of the finest arsenals in the world, a large standing army and a great fleet. Russia, the most serious threat to Sweden at this time, had a larger army but lagged far behind in both equipment and training.

After the Battle of Narva in 1700, one of the first battles of the Great Northern War, the Russian army was so severely devastated that Sweden had an open chance to invade Russia. However, Charles XII did not pursue the Russian army, instead turning against Poland and defeating the Polish king, Augustus II the Strong, and his Saxon allies at the Battle of Kliszów in 1702. This gave Russia time to rebuild and modernise its army.

After the success of invading Poland, Charles XII decided to make an attempt at invading Russia, but this ended in a decisive Russian victory at the Battle of Poltava in 1709. After a long march exposed to Cossack raids, the Russian Tsar Peter the Great's scorched-earth techniques and the extremely cold winter of 1709, the Swedes stood weakened with a shattered morale and were enormously outnumbered against the Russian army at Poltava. The defeat meant the beginning of the end for the Swedish Empire. In addition, the plague raging in East Central Europe devastated the Swedish dominions and reached Central Sweden in 1710. Returning to Sweden in 1715, Charles XII launched two campaigns against Norway in 1716 and 1718, respectively. During the second attempt, he was shot to death during the siege of Fredriksten fortress. The Swedes were not militarily defeated at Fredriksten, but the whole structure and organisation of the campaign fell apart with the king's death. Forced to cede large areas of land in the Treaty of Nystad in 1721, Sweden also lost its place as an empire and as the dominant state on the Baltic Sea. With Sweden's lost influence, Russia emerged as an empire and became one of Europe's dominant nations. As the war finally ended in 1721, Sweden had lost an estimated 200,000 men, 150,000 of those from the area of present-day Sweden and 50,000 from the Finnish part of Sweden.

Executive power was historically shared between the King and an aristocratic Privy council until 1680, followed by the King's autocratic rule initiated by the commoner estates of the Riksdag. As a reaction to the failed Great Northern War, a parliamentary system was introduced in 1719, followed by three different flavours of constitutional monarchy in 1772, 1789 and 1809, the latter granting several civil liberties. Already during the first of those three periods, the 'Era of Liberty' (1719–72) the Swedish Riksdag had developed into a very active parliament, and this tradition continued into the nineteenth century, laying the basis for the transition towards modern democracy at the end of that century.

In the 18th century, Sweden did not have enough resources to maintain its territories outside Scandinavia, and most of them were lost, culminating with the loss in 1809 of eastern Sweden to Russia, which became the highly autonomous Grand Principality of Finland in Imperial Russia.

In interest of re-establishing Swedish dominance in the Baltic Sea, Sweden allied itself against its traditional ally and benefactor, France, in the Napoleonic Wars. However, in 1810, a French Marshal, Jean-Baptiste Bernadotte, was chosen as heir presumptive to Charles XIII; in 1818, he established the House of Bernadotte, taking the regnal name of Charles XIV. Sweden's role in the Battle of Leipzig gave it the authority to force Denmark–Norway, an ally of France, to cede Norway to the King of Sweden on 14 January 1814 in exchange for the northern German provinces, at the Treaty of Kiel. The Norwegian attempts to keep their status as a sovereign state were rejected by the Swedish king, Charles XIII. He launched a military campaign against Norway on 27 July 1814, ending in the Convention of Moss, which forced Norway into a personal union with Sweden under the Swedish crown, which lasted until 1905. The 1814 campaign was the last time Sweden was at war.

The Swedish East India Company began in 1731. The obvious choice of home port was Gothenburg (Swedish: Göteborg) at Sweden's west coast, as the mouth of Göta älv river was very wide and had the county's largest and best harbour for high-seas journeys. The trade continued into the 19th century, and caused the little town to become Sweden's second city.

Between 1750 and 1850, the population in Sweden doubled. According to some scholars, mass emigration to America became the only way to prevent famine and rebellion; over 1% of the population emigrated annually during the 1880s. It is thought that between 1850 and 1910 more than one million Swedes moved to the United States. Nevertheless, Sweden remained poor, retaining a nearly entirely agricultural economy even as Western European countries began to industrialise.

Despite the slow rate of industrialisation into the 19th century, many important changes were taking place in the agrarian economy due to constant innovations and a rapid population growth. These innovations included government-sponsored programmes of enclosure, aggressive exploitation of agricultural lands, and the introduction of new crops such as the potato. The Swedish farming culture began to take on a critical role in Swedish politics, which has continued through modern times with modern Agrarian party (now called the Centre Party). Between 1870 and 1914, Sweden began developing the industrialised economy that exists today.

Strong grassroots movements sprang up in Sweden during the latter half of the 19th century (trade unions, temperance groups, and independent religious groups), creating a strong foundation of democratic principles. These movements precipitated Sweden's migration into a modern parliamentary democracy, achieved by the time of World War I. As the Industrial Revolution progressed during the 20th century, people gradually moved into cities to work in factories and became involved in socialist unions. A communist revolution was avoided in 1917, following the re-introduction of parliamentarism, and the country was democratised.

Sweden was officially neutral during World War I. However, under pressure from the German Empire, they did take steps which were detrimental to the Allied powers – most notably, mining the Öresund channel, thus closing it to Allied shipping, and allowing the Germans to use Swedish facilities and the Swedish cipher to transmit secret messages to their overseas embassies. Sweden also allowed volunteers to fight alongside the Germans for the White Guards against the Red Guards and Russians in the Finnish Civil War, and briefly occupied Åland in cooperation with the German Empire.

As in the First World War, Sweden remained officially neutral during World War II, although its neutrality has been disputed. Sweden was under German influence for much of the war, as ties to the rest of the world were cut off through blockades. The Swedish government unofficially supported Finland in the Winter War and the Continuation War by allowing volunteers and materiel to be shipped to Finland. However, Sweden supported Norwegian resistance against Germany, and in 1943 helped rescue Danish Jews from deportation to Nazi concentration camps.

During the last year of the war, Sweden began to play a role in humanitarian efforts, and many refugees, among them several thousand Jews from Nazi-occupied Europe, were rescued thanks to the Swedish rescue missions to internment camps and partly because Sweden served as a haven for refugees. The Swedish diplomat Raoul Wallenberg and his colleagues ensured the safety of tens of thousands of Hungarian Jews. Nevertheless, both Swedes and others have argued that Sweden could have done more to oppose the Nazis' war efforts.

Sweden was officially a neutral country and remained outside NATO and Warsaw Pact membership during the Cold War, but privately Sweden's leadership had strong ties with the United States and other western governments. Following the war, Sweden took advantage of an intact industrial base, social stability and its natural resources to expand its industry to supply the rebuilding of Europe. Sweden received aid under the Marshall Plan and participated in the OECD. During most of the post-war era, the country was governed by the Swedish Social Democratic Party largely in co-operation with trade unions and industry. The government actively pursued an internationally competitive manufacturing sector of primarily large corporations.

Sweden was one of the founding states of the European Free Trade Area (EFTA). During the 1960s the EFTA countries were often referred to as the Outer Seven, as opposed to the Inner Six of the then-European Economic Community (EEC).

Like many industrialised countries, Sweden entered a period of economic decline and upheaval following the oil embargoes of 1973–74 and 1978–79. In the 1980s several key Swedish industries were significantly restructured. Shipbuilding was discontinued, wood pulp was integrated into modernised paper production, the steel industry was concentrated and specialised, and mechanical engineering was robotised. Swedish GDP per capita ranking declined during this time.

A bursting real estate bubble caused by inadequate controls on lending combined with an international recession and a policy switch from anti-unemployment policies to anti-inflationary policies resulted in a fiscal crisis in the early 1990s. Sweden's GDP declined by around 5%. In 1992, a run on the currency caused the central bank to briefly increase interest rates to 500%.

The response of the government was to cut spending and institute a multitude of reforms to improve Sweden's competitiveness, among them reducing the welfare state and privatising public services and goods. A referendum passed with 52.3% in favour of joining the EU on 13 November 1994. Sweden joined the European Union on 1 January 1995. In a 2003 referendum the Swedish electorate voted against joining the Euro currency. Sweden held the chair of the European Union from 1 July to 31 December 2009.

On 28 September 1994, the MS Estonia sank as the ship was crossing the Baltic Sea, en route from Tallinn, Estonia, to Stockholm, Sweden. The disaster claimed the lives of 852 people (501 of them were Swedes), being one of the worst maritime disasters of the 20th century.

Until 2022, Sweden generally remained non-aligned militarily, although it participated in some joint military exercises with the North Atlantic Treaty Organization (NATO) and some other countries, stationed its troops under NATO command in Afghanistan, took part in EU-sponsored peacekeeping operations in Kosovo, Bosnia and Herzegovina, and Cyprus, and helped enforce a UN-mandated no-fly zone over Libya during the Arab Spring. In addition, there was extensive cooperation with other European countries in the area of defence technology and defence industry; some Swedish-made weaponry was used by Coalition militaries in Iraq. In response to the 2022 Russian invasion of Ukraine, Sweden moved to formally join NATO, alongside Finland. After many months of delays caused by the objections of Turkey and Hungary, Sweden became a NATO member on 7 March 2024.

In recent decades Sweden has become a more culturally diverse nation due to significant immigration; in 2013, it was estimated that 15% of the population was foreign-born, and an additional 5% of the population were born to two immigrant parents. The influx of immigrants has brought new social challenges. Violent incidents have periodically occurred including the 2013 Stockholm riots. In response to these violent events, the anti-immigration opposition party, the Sweden Democrats, promoted their anti-immigration policies, while the left-wing opposition blamed growing inequality caused by the centre-right government's socioeconomic policies.

Since the postwar period, LGBTQ rights in Sweden have gradually expanded through the steady extension of legal and social protections for LGBTQ+ people. Over subsequent decades, anti-discrimination laws, adoption rights, and the ability to change legal gender were progressively strengthened, contributing to high levels of public support for LGBTQ+ equality. In the mid-2010s, however, Sweden also saw the rise of anti-gender mobilizations, which gender studies scholars situate within a broader process of democratic backsliding.

Sweden was heavily affected by the 2015 European migrant crisis, eventually forcing the government to tighten regulations of entry to the country. Some of the asylum restrictions were relaxed again later.

On 30 November 2021, Magdalena Andersson became Sweden's first female prime minister. The September 2022 general election ended in a narrow win to a bloc of right-wing parties. On 18 October 2022, Ulf Kristersson of the Moderate Party became the new Prime Minister.

Situated in Northern Europe, Sweden lies west of the Baltic Sea and Gulf of Bothnia, providing a long coastline, and forms the eastern part of the Scandinavian Peninsula. To the west is the Scandinavian mountain chain (Skanderna), a range that separates Sweden from Norway. Finland is located to its north-east. It has maritime borders with Denmark, Germany, Poland, Russia, Lithuania, Latvia and Estonia, and it is also linked to Denmark (south-west) by the Öresund Bridge. Its border with Norway (1,619 km long) is the longest uninterrupted border within Europe.

Sweden lies between latitudes 55° and 70° N, and mostly between longitudes 11° and 25° E (part of Stora Drammen island is just west of 11°).

At 449,964 km2 (173,732 sq mi), Sweden is the 55th-largest country in the world, the fifth-largest country in Europe, and the largest country in Northern Europe. The lowest elevation in Sweden is in the bay of Lake Hammarsjön, near Kristianstad, at −2.41 m (−7.91 ft) below sea level. The highest point is Kebnekaise at 2,096.8 m (6,879 ft) above sea level.

Sweden has 25 provinces or landskap. While these provinces serve no political or administrative purpose, they play an important role in people's self-identity. The provinces are usually grouped together in three large lands, parts, the northern Norrland, the central Svealand and southern Götaland. The sparsely populated Norrland encompasses almost 60% of the country. Sweden also has the Vindelfjällen Nature Reserve, one of the largest protected areas in Europe, totalling 562,772 ha (approx. 5,628 km2).

About 15% of Sweden lies north of the Arctic Circle. Southern Sweden is predominantly agricultural, with increasing forest coverage northward. Around 65% of Sweden's total land area is covered with forests. The highest population density is in the valley of lake Mälaren and Stockholm, southern Scania along the Öresund coast and along the western coast up to central Bohuslän. Gotland and Öland are Sweden's largest islands; Vänern and Vättern are its largest lakes. Vänern is the third largest in Europe, after Lake Ladoga and Lake Onega in Russia. Combined with the third- and fourth-largest lakes Mälaren and Hjälmaren, these lakes take up a significant part of southern Sweden's area. Sweden's extensive waterway availability throughout the south was exploited with the building of the Göta Canal in the 19th century, shortening the potential distance between the Baltic Sea south of Norrköping and Gothenburg by using the lake and river network to facilitate the canal.

Sweden also has plenty of long rivers draining the lakes. Northern and central Sweden have several wide rivers known as älvar, commonly sourced within the Scandinavian Mountains. The longest river is Klarälven-Göta älv, which originates in Trøndelag in central Norway, running 1,160 kilometres (720 mi) before it enters the sea at Gothenburg. In southern Sweden, narrower rivers known as åar are also common. The vast majority of municipal seats are situated either along the sea, a river, or a lake, and most of the country's population resides in coastal municipalities.

Most of Sweden has a temperate climate, despite its northern latitude, with largely four distinct seasons and mild temperatures throughout the year. The winter in the far south is usually weak and is manifested only through some shorter periods with snow and sub-zero temperatures; autumn may well turn into spring there, without a distinct period of winter. The northern parts of the country have a subarctic climate while the central parts have a humid continental climate. The coastal south can be defined as having either a humid continental climate using the 0 °C isotherm, or an oceanic climate using the -3 °C isotherm.

Due to the increased maritime moderation in the peninsular south, summer differences between the coastlines of the southernmost and northernmost regions are about 2 °C (4 °F) in summer and 10 °C (18 °F) in winter. This grows further when comparing areas in the northern interior where the winter difference in the far north is about 15 °C (27 °F) throughout the country. The warmest summers usually happen in the Mälaren Valley around Stockholm due to the vast landmass shielding the middle east coast from Atlantic low-pressure systems in July. Daytime highs in Sweden's municipal seats vary from 19 °C (66 °F) to 24 °C (75 °F) in July and −9 °C (16 °F) to 3 °C (37 °F) in January. The colder temperatures are influenced by the higher elevation in the northern interior. At sea level, the coldest average highs range from 21 °C (70 °F) to −6 °C (21 °F). As a result of the mild summers, the arctic region of Norrbotten has some of the northernmost agriculture in the world.

Sweden is much warmer and drier than other places at a similar latitude, and even somewhat farther south, mainly because of the combination of the Gulf Stream and the general west wind drift, caused by the direction of Earth's rotation. Because of Sweden's high latitude, the length of daylight varies greatly over the course of a year. North of the Arctic Circle, the sun never sets for part of each summer, and it never rises for part of each winter. In the capital, Stockholm, the sun is up for more than 18 hours in late June but only around 6 hours in late December. Sweden receives between 1,100 and 1,900 hours of sunshine annually.

The highest temperature ever recorded in Sweden was 38 °C (100 °F) in Målilla in 1947, while the coldest temperature ever recorded was −52.6 °C (−62.7 °F) in Vuoggatjålme on 2 February 1966.

On average, most of Sweden receives between 500 and 800 mm (20 and 31 in) of precipitation each year, making it considerably drier than the global average. The south-western part of the country receives more precipitation, between 1,000 and 1,200 mm (39 and 47 in), and some mountain areas in the north are estimated to receive up to 2,000 mm (79 in). Despite northerly locations, southern and central Sweden may have almost no snow in some winters. Most of Sweden is located in the rain shadow of the Scandinavian Mountains through Norway and north-west Sweden. It is predicted that as the Barents Sea gets less frozen in the coming winters, becoming thus "Atlantified", additional evaporation will increase future snowfalls in Sweden and much of continental Europe.

Sweden has a considerable south to north distance which causes large climatic difference, especially during the winter. The related matter of the length and strength of the four seasons plays a role in which plants that naturally can grow at various places. Sweden is divided into five major vegetation zones. These are:

The southern deciduous forest zone

The southern coniferous forest zone

The northern coniferous forest zone, or the Taiga

The alpine-birch zone

The bare mountain zone

Southern deciduous forest zone, also known as the nemoral region, the southern deciduous forest zone is a part of a larger vegetation zone which also includes Denmark and large parts of Central Europe. It has to a rather large degree become agricultural areas, but larger and smaller forests still exist. The region is characterised by a large wealth of trees and shrubs. The beech is the most dominant tree, but oak can also form smaller forests. Elm at one time formed forests, but have been heavily reduced due to Dutch Elm disease. Other important trees and shrubs in this zone include hornbeam, elder, hazel, fly honeysuckle, linden (lime), spindle, yew, alder buckthorn, blackthorn, aspen, European rowan, Swedish whitebeam, juniper, European holly, ivy, dogwood, goat willow, larch, bird cherry, wild cherry, maple, ash, alder along creeks, and in sandy soil birch compete with pine. Spruce is not native but between approximately 1870 and 1980, large areas were planted with it. During the last 40–50 years large areas of former spruce plantings have been replanted with deciduous forest.

Southern coniferous forest zone, also known as the boreo-nemoral region, is delimited by the oak's northern natural limit (limes norrlandicus) and the Spruce's southern natural limit, between the southern deciduous zone and the Taiga farther north. In the southern parts of this zone the coniferous species are found, mainly spruce and pine, mixed with various deciduous trees. Birch grows largely everywhere. The beech's northern boundary crosses this zone. Although in its natural area, also planted Spruce are common, and such woods are very dense, as the spruces can grow very tight, especially in this vegetation zone's southern areas.

The northern coniferous forest zone or the Taiga begins north of the natural boundary of the oak. Of deciduous species the birch is the only one of significance. Pine and spruce are dominant, but the forests are slowly but surely more sparsely grown the farther towards the north it gets. In the extreme north is it difficult to state the trees forms true forests at all, due to the large distances between the trees.

The alpine-birch zone, in the Scandinavian mountains, depending on both latitude and altitude, is an area where only a smaller kind of birch (Betula pubescens or B.tortuosa) can grow. Where this vegetation zone ends, no trees grow at all: the bare mountain zone.

Sweden had a 2019 Forest Landscape Integrity Index mean score of 5.35/10, ranking it 103rd globally out of 172 countries. Sweden was ranked sixth in the Environmental Performance Index in 2024. The index combines various indicators around known issues around the world, and measures how good they fit in among each countries on a scale. Sweden scores well in parameters like air pollution, air quality, waste management, sanitation and drinking water etc.

Sweden has a history of strong political involvement by ordinary people through its "popular movements" (Folkrörelser), the most notable being trade unions, the independent Christian movement, the temperance movement, the women's movement, and the intellectual property pirate movements. Sweden was the first country in the world to outlaw corporal punishment of children by their parents (parents' right to spank their own children was first removed in 1966, and it was explicitly prohibited by law from July 1979).

Sweden is currently leading the EU in statistics measuring equality in the political system and equality in the education system. The Global Gender Gap Report 2006 ranked Sweden as the number one country in terms of gender equality.

According to International IDEA's Global State of Democracy (GSoD) Indices and Democracy Tracker, Sweden performs in the high range on overall democratic measures, with particular strengths in elected government and effective parliament.

Sweden has four fundamental laws (Swedish: grundlagar) which together form the Constitution: the Instrument of Government (Swedish: Regeringsformen), the Act of Succession (Swedish: Successionsordningen), the Freedom of the Press Act (Swedish: Tryckfrihetsförordningen), and the Fundamental Law on Freedom of Expression (Swedish: Yttrandefrihetsgrundlagen).

The public sector in Sweden is divided into two parts: the legal person known as the State (Swedish: staten) and local authorities: the latter include Regional Councils (Swedish: regioner) (renamed from county councils (landsting) in 2020) and local Municipalities (Swedish: kommuner). The local authorities, rather than the State, make up the larger part of the public sector in Sweden. Regional Councils and Municipalities are independent of one another, the former merely covers a larger geographical area than the latter. The local authorities have self-rule, as mandated by the Constitution, and their own tax base. Notwithstanding their self-rule, local authorities are nevertheless in practice dependent upon the State, as the parameters of their responsibilities and the extent of their jurisdiction are specified in the Local Government Act (Swedish: Kommunallagen) passed by the Riksdag.

Sweden is a constitutional monarchy, and King Carl XVI Gustaf is the head of state, but the role of the monarch is limited to ceremonial and representative functions. Under the provisions of the 1974 Instrument of Government, the King lacks any formal political power. The King opens the annual Riksdag session, chairs the Special Council held during a change of Government, holds regular Information Councils with the Prime Minister and the Government, chairs the meetings of the Advisory Council on Foreign Affairs (Swedish: Utrikesnämnden), and receives Letters of Credence of foreign ambassadors to Sweden and signs those of Swedish ambassadors sent abroad. In addition, the King pays State Visits abroad and hosts those incoming.

Legislative power is vested in the unicameral Riksdag with 349 members. General elections are held every four years. Legislation may be initiated by the Government or by members of the Riksdag. Members are elected on the basis of proportional representation to a four-year term. The internal workings of the Riksdag are, in addition to the Instrument of Government, regulated by the Riksdag Act (Swedish: Riksdagsordningen). The fundamental laws can be altered by the Riksdag alone; only an absolute majority with two separate votes, separated by a general election in between, is required.

The Government (Swedish: Regeringen) operates as a collegial body with collective responsibility and consists of the Prime Minister—nominated by the Speaker and elected by a vote in the Riksdag—and other cabinet ministers (Swedish: Statsråd), appointed and dismissed at the sole discretion of the Prime Minister. The Government is the supreme executive authority and is responsible for its actions to the Riksdag.

Most of the State administrative authorities (Swedish: statliga förvaltningsmyndigheter) report to the Government. A unique feature of Swedish State administration is that individual cabinet ministers do not bear any individual ministerial responsibility for the performance of the agencies within their portfolio; as the director-generals and other heads of government agencies report directly to the Government as a whole; and individual ministers are prohibited from interfering; thus the origin of the pejorative in Swedish political parlance term ministerstyre (English: "ministerial rule") in matters that are to be handled by the individual agencies, unless otherwise specifically provided for in law.

The Judiciary is independent from the Riksdag, Government and other State administrative authorities. The role of judicial review of legislation is not practised by the courts; instead, the Council on Legislation gives non-binding opinions on legality. There is no stare decisis in that courts are not bound by precedent, although it is influential.

For over 50 years, Sweden had had five parties who continually received enough votes to gain seats in the Riksdag—the Social Democrats, the Moderate Party, the Centre Party, the Liberal People's Party and the Left Party—before the Green Party became the sixth party in the 1988 election. In the 1991 election, while the Greens lost their seats, two new parties gained seats for the first time: the Christian Democrats and New Democracy. It was not until elections in 2010 that an eighth party, the Sweden Democrats, gained Riksdag seats. In the elections to the European Parliament, parties who have failed to pass the Riksdag threshold have managed to gain representation at that venue: the June List (2004–2009), the Pirate Party (2009–2014), and Feminist Initiative (2014–2019).

Election turnout in Sweden has always been high by international comparison. Although it declined in recent decades, the latest elections saw an increase in voter turnout (80.11% in 2002, 81.99% in 2006, 84.63% in 2010, 85.81 in 2014) and 87.18% in 2018. Swedish politicians enjoyed a high degree of confidence from the citizens in the 1960s, However, that level of confidence has since declined steadily, and is now at a markedly lower level than in its Scandinavian neighbours.

Sweden is a unitary state divided into 21 regions (regioner) and 290 municipalities (kommuner). Every region corresponds to a county (län) with a number of municipalities per county. Regions and municipalities are both local governments but have different roles and separate responsibilities. Health care, public transport and certain cultural institutions are administered by regional councils. Preschools, primary and secondary schooling, public water utilities, garbage disposal, elderly care and rescue services are administered by the municipalities. Gotland is a special case of being a region with only one municipality and the functions of region and municipality are performed by the same organisation.

Municipal and region government in Sweden is similar to city commission and cabinet-style council government. Both levels have legislative assemblies (municipal councils and region assemblies of between 31 and 101 members (always an uneven number) that are elected from party-list proportional representation at the general election which are held every four years in conjunction with the national parliamentary elections.

Municipalities are also divided into a total of 2,512 parishes (församlingar). These have no official political responsibilities but are traditional subdivisions of the Church of Sweden and still have some importance as census districts.

The Swedish central government has 21 County Administrative Boards (Swedish: länsstyrelser), which are responsible for regional state administration not assigned to other government agencies or local government. Each county administrative board is led by a County Governor (Swedish: landshövding) appointed for a term of six years. The list of previous officeholders for the counties stretches back, in most cases, to 1634 when the counties were created by Lord High Chancellor Count Axel Oxenstierna. The main responsibility of the County Administrative Board is to co-ordinate the development of the county in line with goals set by the Riksdag and Government.

There are older historical divisions, primarily the twenty-five provinces and three lands, which still retain cultural significance.