The United Left (ZL) was a social democratic and socialist political party in Poland that existed from July 2015 to February 2016. The party was formed as a merger of the Democratic Left Alliance, Your Movement, Polish Socialist Party, Labor United, and The Greens of Poland, and it was backed by the All-Poland Alliance of Trade Unions. In 2015, it did not gain any seats in the parliamentary elections, and it was dissolved in February 2016.