Aristide Briand (French: [aʁistid bʁiɑ̃]; 28 March 1862 – 7 March 1932) was a French statesman who served eleven terms as Prime Minister of France during the French Third Republic and was a co-laureate of the 1926 Nobel Peace Prize.

He was born in Nantes, Loire-Atlantique of a petty bourgeois family. He attended the Nantes Lycée, where, in 1877, he developed a close friendship with Jules Verne. He studied law, and soon went into politics, associating himself with the most advanced movements, writing articles for the anarchist journal Le Peuple, and directing the Lanterne for some time. From this he passed to the Petite République, leaving it to found L'Humanité, in collaboration with Jean Jaurès.

At the same time he was prominent in the movement for the formation of trade unions, and at the congress of working men at Nantes in 1894 he secured the adoption of the labor union idea against the adherents of Jules Guesde. From that time, Briand was one of the leaders of the French Socialist Party. In 1902, after several unsuccessful attempts, he was elected deputy. He declared himself a strong partisan of the union of the Left in what was known as the Bloc, in order to check the reactionary Deputies of the Right.