Juan Negrín y López (Spanish pronunciation: [xwan ne'??in]; 3 February 1892 – 12 November 1956) was a Spanish politician and physician.
He was a leader of the Spanish Socialist Workers' Party (PSOE) and served as finance minister.
He was President of the Council of Ministers of the Second Spanish Republic several times between 1937 and 1945, already in exile.
He was the last Loyalist premier of Spain (1937–39), and presided over the defeat of the Republican forces by the rebel faction under General Francisco Franco during the Spanish Civil War.