Jacques Doriot (ʒak dɔʁjo; 26 September 1898 – 22 February 1945) was a French politician, initially communist, later fascist, before and during World War II.
In 1936, after his exclusion from the Communist Party, he founded the French Popular Party (PPF) and took over the newspaper La Liberté, which took a stand against the Popular Front.
During the war, Doriot was a radical supporter of collaboration and contributed to the creation of the Legion of French Volunteers against Bolshevism (LVF). He fought personally in German uniform on the Eastern Front, with the rank of lieutenant.
Doriot moved to Saint Denis, near Paris, at an early age and became a labourer. In 1916, in the midst of World War I, he became a committed socialist, but his political activity was halted by his joining the French Army in 1917. Participating in active combat during World War I, Doriot was captured by enemy troops and remained a prisoner of war until 1918. For his wartime service, Doriot was awarded the Croix de guerre.
After being released, he returned to France and in 1920 joined the French Communist Party (PCF), quickly rising through the party - within a few years, he had become one of the PCF major leaders. In 1922 he became a member of the Presidium of the Executive Committee of the Comintern, and a year later was made Secretary of the French Federation of Young Communists. In 1923, Doriot was arrested for violently protesting French occupation of the Ruhr Area. He was released a year later, upon being elected to the French Chamber of Deputies (the Third Republic equivalent of the National Assembly) by the people of Saint Denis.
In 1931, Doriot was elected mayor of Saint Denis. Around this time, he opposed the "social fascism" theory and came to advocate a Popular Front alliance between the Communists and other French socialist parties with whom Doriot sympathized on a number of issues. Although this would soon become official Communist Party policy, at the time it was seen as heretical and Doriot was expelled from the Communist Party in 1934.