United Left of Navarre (, . IUN-NEB) is the Navarrese federation of the Spanish left-wing political and social movement United Left. José Miguel Nuin Moreno is the current General Coordinator. The major member of the coalition is the Communist Party of Euskadi (EPK-PCE, Basque federation of the Communist Party of Spain).
In the 1996 Spanish general election IUN-NEB gained 1 of the 5 Navarrese seats in the Congreso de los Diputados.
Since 2011 IUN-NEB has a permanent alliance with Batzarre, Izquierda-Ezkerra (I-E). After the 2015 Navarrese regional election I-E signed a pact with Geroa Bai, EH Bildu and Podemos to remove the Navarrese People's Union (UPN) from power and elect Uxue Barkos as the president of Navarre.