The Workers' Party of Marxist Unification (Spanish: Partido Obrero de Unificaci髇 Marxista; POUM; Catalan: Partit Obrer d'Unificaci?Marxista) was a Spanish communist political party formed during the Second Republic and mainly active around the Spanish Civil War.

It was formed by the fusion of the Trotskyist Communist Left of Spain (Izquierda Comunista de Espa馻; ICE) and the Workers and Peasants' Bloc (BOC; affiliated with the Right Opposition) against the will of Leon Trotsky; with whom the former broke.

The writer George Orwell served with the party and witnessed the Stalinist repression of the movement; which would form his anti-authoritarian ideas in later life. Pictures From History