Union of Poles in Germany (Polish: Związek Polaków w Niemczech, German: Bund der Polen in Deutschland e.V.) is an organisation of the Polish minority in Germany, founded in 1922. In 1924, the union initiated collaboration between other minorities, including Sorbs, Danes, Frisians and Lithuanians, under the umbrella organization Association of National Minorities in Germany. From 1939 until 1945 the Union was outlawed in Nazi Germany. After 1945 it had lost some of its influence; in 1950 the Union of Poles in Germany split into two organizations: the Union of Poles in Germany (German: Bund der Polen in Deutschland e.V.), which refused to recognize the communist Polish government of the Polish United Workers' Party, and the Union of Poles "Zgoda" (Unity) (German: Bund der Polen "Zgoda" (Eintracht)), which did recognize the new Communist government in Warsaw and had contacts with it. The split was healed in 1991.
The union was intended to express the views of the Polish minority in Germany, This partly comprised the Polish-native population of the former East German provinces which remained with Germany under the conditions of the Treaty of Versailles (Upper Silesia, East Brandenburg, Pomerania, Warmia or areas where Poles settled in Middle Ages (East Prussia) — mostly farmers and workers — and partly the Polish immigrants in Ruhr area (see Ruhr Poles). This constituency of the Union was calculated to number approximately 1,500,000 people. Official German statistics from the mid-1920s showed approximately 200,000 persons with Polish mother tongue. Polish political parties gained between 33,000 and 101,000 votes in the legislative elections in the Weimar Republic between 1919 and 1932. However, the Polish minority was only legally recognised as such in Upper Silesia, where they possessed international status due to Treaty of Versailles. In other areas Poles had no special minority rights.