Minsk (Belarusian: Мінск, pronounced [mʲinsk]; Russian: Минск, pronounced [mʲinsk]) is the capital and largest city of Belarus, located on the Svislach and the now subterranean Nyamiha rivers. As the capital, Minsk has a special administrative status in Belarus and is the administrative centre of Minsk region and Minsk district. As of 2024,^[update] it has a population of about two million, making Minsk the 11th-most populous city in Europe. Minsk is one of the administrative capitals of the Commonwealth of Independent States (CIS) and the Eurasian Economic Union (EAEU).

First mentioned in 1067, Minsk became the capital of the Principality of Minsk, an appanage of the Principality of Polotsk, before being annexed by the Grand Duchy of Lithuania in 1242. It received town privileges in 1499. From 1569, it was the capital of Minsk Voivodeship, an administrative division of the Polish–Lithuanian Commonwealth. It was part of the territories annexed by the Russian Empire in 1793, as a consequence of the Second Partition of Poland. From 1919 to 1991, after the Russian Revolution, Minsk was the capital of the Byelorussian Soviet Socialist Republic, which became a republic of the Soviet Union in 1922. Following the dissolution of the Soviet Union, Minsk became the capital of the newly independent Republic of Belarus.

The Old East Slavic name of the town was Мѣньскъ (Měnsk < Early Proto-Slavic or Late Indo-European *Mēnĭskŭ), derived from a river name Měn (< Mēnŭ).^{[citation needed]} The resulting^{[clarification needed]} form of the name, Minsk (spelled either Минскъ or Мѣнскъ), was taken over both in Russian (modern spelling: Минск) and Polish (Mińsk), and under the influence of Russian this form also became official in Belarusian. The direct continuation of the name in Belarusian is Miensk (Менск, IPA: [ˈmʲɛnsk]), which some Belarusian-speakers continue to use as their preferred name for the city.

When Belarus was under Polish rule, the names Mińsk Litewski ('Minsk of Lithuania') and Mińsk Białoruski ('Minsk of Belarus') were used to differentiate this place name from Mińsk Mazowiecki 'Minsk in Mazovia'. In modern Polish, Mińsk without an attribute usually refers to the city in Belarus, which is about 50 times bigger than Mińsk Mazowiecki; (compare Brest-Litovsk and Brześć Kujawski for a similar case).

The Svislach River valley was the settlement boundary between two early East Slavic tribes – the Krivichs and Dregoviches. By 980, the area was incorporated into the early medieval Principality of Polotsk, one of the earliest East Slavic principalities of Kievan Rus'. Minsk was first mentioned in the name form Měneskъ (Мѣнескъ) in the Primary Chronicle for the year 1067 in association with the Battle on the River Nemiga. 1067 is now widely accepted as the founding year of Minsk. City authorities consider the date of 3 March 1067 to be the exact founding date of the city, though the town (by then fortified by wooden walls) had certainly existed for some time by then. The origin of the name is unknown but there are several theories.

In the early 12th century, the Principality of Polotsk disintegrated into smaller fiefs. The Principality of Minsk was established by one of the Polotsk dynasty princes. In 1129, the Principality of Minsk was annexed by Kiev, the dominant principality of Kievan Rus'; however in 1146 the Polotsk dynasty regained control of the principality. By 1150, Minsk rivalled Polotsk as the major city in the former Principality of Polotsk. The princes of Minsk and Polotsk were engaged in years of struggle trying to unite all lands previously under the rule of Polotsk.

Minsk escaped the Mongol invasion of Rus in 1237–1239. In 1242, Minsk became a part of the expanding Grand Duchy of Lithuania. It joined peacefully and local elites enjoyed high rank in the society of the Grand Duchy. In 1413, the Grand Duchy of Lithuania and Kingdom of Poland entered into a union. Minsk became the centre of Minsk Voivodship (province). In 1441, as Grand Duke of Lithuania, Casimir IV included Minsk in a list of cities enjoying certain privileges, and in 1499, during the reign of his son, Alexander Jagiellon, Minsk received town privileges under Magdeburg law. In 1569, after the Union of Lublin, the Grand Duchy of Lithuania and the Kingdom of Poland merged into a single state, the Polish–Lithuanian Commonwealth.

By the middle of the 16th century, Minsk was an important economic and cultural centre in the Polish–Lithuanian Commonwealth. It was also an important centre for the Eastern Orthodox Church. Following the Union of Brest, both the Eastern Catholic Churches and the Roman Catholic Church increased in influence.^{[citation needed]}