The Popular Front (French: Front populaire) was an alliance of French left-wing movements, including the communist French Communist Party (PCF), the socialist French Section of the Workers' International (SFIO) and the progressive Radical-Socialist Republican Party, during the interwar period. Three months after the victory of the Spanish Popular Front, the Popular Front won the May 1936 legislative election, leading to the formation of a government first headed by SFIO leader Léon Blum and exclusively composed of republican and SFIO ministers.

Blum's government implemented various social reforms. The workers' movement welcomed this electoral victory by launching a general strike in May–June 1936, resulting in the negotiation of the Matignon Agreements, one of the cornerstones of social rights in France. All employees were assured a two-week paid vacation, and the rights of unions were strengthened. The socialist movement's euphoria was apparent in SFIO member Marceau Pivert's "Tout est possible!" (Everything is possible). However, the economy continued to stall, with 1938 production still not having recovered to 1929 levels, and higher wages had been neutralized by inflation. Businessmen took their funds overseas. Blum was forced to stop his reforms and devalue the franc. With the French Senate controlled by conservatives, Blum fell out of power in June 1937. The presidency of the cabinet was then taken over by Camille Chautemps, a Radical-Socialist, but Blum came back as President of the Council in March 1938, before being succeeded by Édouard Daladier, another Radical-Socialist, the next month. The Popular Front dissolved itself in autumn 1938, confronted by internal dissensions related to the Spanish Civil War (1936–1939), opposition of the right-wing, and the persistent effects of the Great Depression.

After one year of major activity, it lost its spirit by June 1937 and could only temporize as the European crisis worsened. The Socialists were forced out; only the Radical-Socialists and smaller left-republican parties were left. It failed to live up to the expectations of the left. The workers obtained major new rights, but their 48 percent increase in wages was offset by a 46 percent rise in prices. Unemployment remained high, and overall industrial production was stagnant. Industry had great difficulty adjusting to the imposition of a 40-hour workweek, which caused serious disruptions while France was desperately trying to catch up with Germany in military production. France joined other nations and bitterly disappointed many French leftists in refusing to help the Spanish Republicans in the Spanish Civil War, partly because the right threatened another civil war in France itself.