Białystok [[bʲjaˈwɨstɔk] (byah-WIH-stock; Belarusian:Беласток Bielastok, Lithuanian:Balstogė, Russian:Белосток Belostok, Yiddish:ביאַליסטאָק Byalistok‎) is the largest city in northeastern Poland and the capital of the Podlaskie Voivodeship.

Located in the Białystok Uplands (Polish:Wysoczyzna Białostocka) of the Podlaskie Plain (Polish:Nizina Północnopodlaska) on the banks of the Biała River, Białystok ranks second in terms of population density, eleventh in population, and thirteenth in area, of the cities of Poland. It has historically attracted migrants from elsewhere in Poland and beyond, particularly from Central and Eastern Europe. This is facilitated by the fact that the nearby border with Belarus is also the eastern border of the European Union, as well as the Schengen Area. The city and its adjacent municipalities constitute Metropolitan Białystok. The city has a Warm Summer Continental climate, characterized by warm summers and long frosty winters. Forests are an important part of Białystok's character, and occupy around 1,756 ha (4,340 acres) (17.2% of the administrative area of the city) which places it as the fifth most forested city in Poland.