The Democratic Union () was a market liberal party in Poland. The party was founded in 1991 by Prime Minister, Christian Democrat Tadeusz Mazowiecki as a merger of the Citizens' Movement for Democratic Action (Ruch Obywatelski Akcja Demokratyczna) and the Forum of the Democratic Right (Forum Prawicy Demokratycznej).
The party presented a staunchly market-liberal platform, and was described as socioeconomically and socioculturally right-wing. Important members were Bronisà Âaw Geremek, Jacek Kuroà Â, Adam Michnik, Hanna Suchocka, Jan Rokita and Aleksander Hall.
In 1994, the party merged with the Liberal Democratic Congress into the Freedom Union (Unia Wolnoà Âci).