Kaliningrad Oblast (Russian: Калининградская область, romanized: Kaliningradskaya oblastʹ) is the westernmost federal subject of Russia. It is a semi-exclave on the Baltic Sea within the historical Baltic region of Prussia, bordered by Poland to the south, Lithuania to the north and east, and the Baltic Sea to the west. The largest city and administrative centre is the city of Kaliningrad. The port city of Baltiysk is Russia's only port on the Baltic Sea that remains ice-free in winter. Kaliningrad Oblast had a population of roughly one million in the 2021 Russian census. It has an area of 15,125 square kilometres (5,840 sq mi).

Various peoples, including Lithuanians, Germans, and Poles, lived on the land which is now Kaliningrad. The territory was formerly the northern part of East Prussia. With the defeat of Nazi Germany in World War II, the territory was annexed to the Russian SFSR by the Soviet Union. Following the post-war migration and flight and expulsion of Germans, the territory was populated with Soviet citizens, mostly Russians.

History

The territory of what is now the Kaliningrad Oblast used to be inhabited by the Old Prussians and other Western Balts, prior to the Teutonic conquest in the early Late Middle Ages. Afterwards, it was settled by Germans (especially the western part), Lithuanians (especially Lithuania Minor) and Poles (especially Königsberg, Polish: Królewiec, and the current southern border strip). The Old Prussians became extinct due to Germanisation in the first half of the 18th century. The Lithuanian-inhabited areas of the Teutonic State were known as Lithuania Minor, which encompassed all of modern Kaliningrad Oblast until the 18th century.

Kaliningrad Oblast
Foma39 at Russian Wikipedia (Andrey Fimushkin) · Public domain via Wikimedia Commons

Late Middle Ages

In the 13th century, the Teutonic Order conquered the region and established the State of the Teutonic Order, a theocracy. In 1255, on the foundations of a destroyed Sambian settlement known as Tvanksta, the Teutonic Order founded the city of Königsberg (modern Kaliningrad), naming it in honour of Ottokar II of Bohemia.

The Northern Crusades, including the Lithuanian Crusade, were partly motivated by colonization. The German colonist peasants, craftsmen, and merchants were predominantly concentrated in the southern part of the Teutonic State and did not move into Nadruvia and Skalvia due to the Lithuanian military threat.