The history of the Jews in Ukraine dates back over a thousand years; Jewish communities have existed in the modern territory of Ukraine from the time of the Kievan Rus' (late 9th to mid-13th century). Important Jewish religious and cultural movements, from Hasidism to Zionism, arose there. According to the World Jewish Congress, the Jewish community in Ukraine constitutes Europe's third-largest and the world's fifth-largest.
At times it flourished, while at other times it faced persecution and anti-Semitic discrimination. In the Ukrainian People's Republic (1917-1920), Yiddish became a state language, along with Ukrainian and Russian. At that time, the Jewish National Union was created and the community was granted autonomous status. Yiddish was used on Ukrainian currency between 1917 and 1920. Before World War II, slightly less than one-third of Ukraine's urban population consisted of Jews. Ukrainian Jews included sub-groups with distinct characteristics, including Ashkenazi Jews, Mountain Jews, Bukharan Jews, Crimean Karaites, Krymchak Jews, and Georgian Jews.
In the westernmost region, Jews were mentioned for the first time in records in 1030. During the Khmelnytsky Uprising between 1648 and 1657, an army of Cossacks massacred and took large numbers of Jews, Roman Catholics, and Uniate Christians into captivity. One estimate (1996) reported that 15,000-30,000 Jews were killed or taken captive, and that 300 Jewish communities were completely destroyed. More recent estimates (2014) report mortality of 3,000-6,000 people between the years 1648–1649.
During 1821 anti-Jewish riots in Odesa followed the death of the Greek Orthodox Patriarch in Constantinople, in which 14 Jews were recorded killed. Some sources claim this episode as the first pogrom. At the start of the 20th century, anti-Jewish pogroms continued, leading to large-scale emigration. In 1915, the imperial Russian government expelled thousands of Jews from the Empire's border areas.
During the Russian Revolution and ensuing Civil War, an estimated 31,071 Jews were killed in pogroms between 1918 and 1920.