United Left (Slovene: Združena levica, abbreviated ZL) was a left-wing electoral alliance in Slovenia between the Democratic Labour Party [it; sl] (DSD), Party for Sustainable Development of Slovenia [de; it; nl; sl] (TRS), and Initiative for Democratic Socialism (IDS).

[3][6] The alliance was formed as a socialist and eurosceptic electoral list with the intention of contesting local, European parliament, and general elections.

[1][7] ZL made its electoral debut during the 2014 European Parliament election where it did not garner a sufficient vote share to be granted any seats.

[9] The alliance did not contest the local elections as a single entity, instead, each of the three constituent parties put forward candidates independently.

Representatives of DSD and the fourth group, which do not hold any of the 6 parliamentary seats, stated that the other two parties increasingly operated in a non-democratic manner as the reason for remaining independent.