Russia, or the Russian Federation, is a transcontinental country located in Eastern Europe and Northern Asia. It extends from the Baltic Sea in the west to the Pacific Ocean in the east, and from the Arctic Ocean in the north to the Black and Caspian seas in the south. Russia covers 17,125,191 square kilometres (6,612,073 sq mi), spanning more than one-eighth of the Earth’s inhabited land area, stretching eleven time zones, and bordering 16 sovereign nations. Moscow is the country’s capital and largest city; other major cities include Saint Petersburg, Novosibirsk, Yekaterinburg, Kazan, Nizhny Novgorod, Chelyabinsk and Samara.

Russia is the largest country in the world, the ninth-most populous country, as well as the most populous country in Europe. The country is one of the world’s most sparsely populated and urbanized. About half of the country’s total area is forested, concentrating around four-fifths of its total population of over 146.8 million on its smaller and dense western portion, as opposed to its larger and sparse eastern portion. Russia is administratively divided into 85 federal subjects. The Moscow Metropolitan Area is the largest metropolitan area in Europe, and among the largest in the world, with more than 20 million residents.

The East Slavs emerged as a recognisable group in Europe between the 3rd and 8th centuries AD. The medieval state of Rus’ arose in the 9th century. In 988 it adopted Orthodox Christianity from the Byzantine Empire, beginning the synthesis of Byzantine and Slavic cultures that defined Russian culture for the next millennium. Rus’ ultimately disintegrated into a number of smaller states, until it was finally reunified by the Grand Duchy of Moscow in the 15th century. By the 18th century, the nation had greatly expanded through conquest, annexation, and exploration to become the Russian Empire, which became a major European power, and the third-largest empire in history. Following the Russian Revolution, the Russian SFSR became the largest and leading constituent of the Soviet Union, the world’s first constitutionally socialist state. The Soviet Union played a decisive role in the Allied victory in World War II, and emerged as a superpower and rival to the United States during the Cold War. The Soviet era saw some of the most significant technological achievements of the 20th century. Following the dissolution of the Soviet Union in 1991, the Russian SFSR reconstituted itself as the Russian Federation and is recognised as the continuing legal personality and a successor of the Soviet Union. Following the constitutional crisis of 1993, a new constitution was adopted, and Russia has since been governed as a federal semi-presidential republic.

Russia is described as a potential superpower, with the world’s second-most powerful military, and the fourth-highest military expenditure. As a recognised nuclear-weapon state, the country possesses the world’s largest stockpile of nuclear weapons. Its economy ranks as the eleventh-largest in the world by nominal GDP and the sixth-largest by PPP. Russia’s extensive mineral and energy resources are the largest in the world, and it is one of the leading producers of oil and natural gas globally. It hosts the world’s ninth-greatest number of UNESCO World Heritage Sites, and is simultaneously ranked very high in the Human Development Index, with a universal healthcare system, and a free university education. Russia is a permanent member of the United Nations Security Council, a member of the SCO, the G20, the Council of Europe, the APEC, the OSCE, the IIB and the WTO, as well as the leading member of the CIS, the CSTO, and the EAEU.

The name Russia is derived from Rus’, a medieval state populated mostly by the East Slavs. However, this proper name became more prominent in the later history, and the country typically was called by its inhabitants “Русская Земля” (russkaja zemlja), which can be translated as “Russian Land” or “Land of Rus’”. In order to distinguish this state from other states derived from it, it is denoted as Kievan Rus’ by modern historiography. The name Rus itself comes from the early medieval Rus’ people, and Swedish merchants and warriors, who relocated from across the Baltic Sea and founded a state centered on Novgorod that later became Kievan Rus’.

An old Latin version of the name Rus’ was Ruthenia, mostly applied to the western and southern regions of Rus’ that were adjacent to Catholic Europe. The current name of the country, Россия (Rossija), comes from the Byzantine Greek designation of the Rus’, Ρωσσία Rossía—spelled Ρωσία (Rosía pronounced [roˈsia]) in Modern Greek.

The standard way to refer to citizens of Russia is “Russians” in English. There are two Russian words which are commonly translated into English as “Russians”. One is “русские” (Russkiye), which means “ethnic Russians”, another is “Российский” (Rossiiskii), which means “Russian citizens”, regardless of ethnicity.

Nomadic pastoralism developed in the Pontic-Caspian steppe beginning in the Chalcolithic.

In classical antiquity, the Pontic Steppe was known as Scythia. Beginning in the 8th century BC, Ancient Greek traders brought their civilization to the trade emporiums in Tanais and Phanagoria. Ancient Greek explorers, most notably Pytheas, even went as far as modern day Kaliningrad, on the Baltic Sea. Romans settled on the western part of the Caspian Sea, where their empire stretched towards the east. In the 3rd to 4th centuries AD a semi-legendary Gothic kingdom of Oium existed in Southern Russia until it was overrun by Huns. Between the 3rd and 6th centuries AD, the Bosporan Kingdom, a Hellenistic polity which succeeded the Greek colonies, was also overwhelmed by nomadic invasions led by warlike tribes, such as the Huns and Eurasian Avars. A Turkic people, the Khazars, ruled the lower Volga basin steppes between the Caspian and Black Seas until tare the Slavic tribes, whose original home is thought by some scholars to have been the wooded areas of the Pinsk Marshes. The East Slavs gradually settled Western Russia in two waves: one moving from Kiev toward present-day Suzdal and Murom and another from Polotsk toward Novgorod and Rostov. From the 7th century onwards, the East Slavs constituted the bulk of the population in Western Russia and assimilated the native Finno-Ugric peoples, including the Merya, the Muromians, and the Meshchera.