The Agrarian Union (Polish: Związek Chłopski, ZC) was a political party in Poland.
The party was established on 11 May 1924 by a merger of the Polish People's Party "Left" and a breakaway faction of the Polish People's Party "Piast". In January 1926 it merged into Stronnictwo Chłopskie.[1]
The party was reformed in 1928 by Jan Stapiński.[1] In the elections that year, the party received 1.2% of the vote, winning three seats in the Sejm.[2] In 1931 it became a faction within the Nonpartisan Bloc for Cooperation with the Government and ceased to exist as an independent party.