|Founded||1 December 1974|
3 April 2005
|Dissolved||3 April 2005|
|Merger of||CARP (ML)|
|Merged into||Left Bloc|
|Headquarters||Rua de São Bento, 698, Lisboa, Portugal 1250-223|
|Political position||Left-wing to far-left|
The Popular Democratic Union (Portuguese: União Democrática Popular, pronounced [uni'w? d?mu'k?atik? pupu'la?], or UDP) is a Marxist political movement in Portugal. The UDP transformed itself into a political association at its 15th congress due to its merger with other left-wing parties in the Left Bloc.
The party was founded in December 1974 as a common mass front of the Committee for Support to the Reconstruction of the Party (Marxist-Leninist) (CARP(ML)), Revolutionary Marxist-Leninist Unity (URML) and Revolutionary Communist Committees (Marxist-Leninist). UDP ran lists in the first free election in Portugal in 1975, and elected one MP in that election. UDP also ran in the subsequent elections until 1983. After that it ran integrated in the electoral lists of the Portuguese Communist Party until 1991.
The current president of People's Democratic Union is Joana Mortágua (2010), 24 years old. Joana Mortágua was Left Bloc candidate in the national legislative elections of 2009, electoral district of Évora and is member of the current Political Commission of Left Bloc.