United Left of Castile and León (Spanish: Izquierda Unida de Castilla y León; IUCyL) is the Castilian-Leonese federation of the Spanish left wing political and social movement United Left.

José María González[2] is the current General Coordinator.

The major member of the coalition is the Communist Party of Castile–León (PCCL, Castilian-Leonese federation of the PCE).

In the Castile and León elections of 2015 IUCyL gained 1 seat in the Cortes of Castile and León.

This article about an organisation based in Spain is a stub.