The French Workers' Party (French: Parti Ouvrier Français, POF) was the French socialist party created in 1880 by Jules Guesde and Paul Lafargue, Karl Marx's son-in-law (famous for having written The Right to Be Lazy, which criticized work as such, criticizing heavily liberal moral frameworks of "Right to Work").

A revolutionary party, it had as aim to abolish capitalism and replace it with a communist society.

The party's programme, written by Guesde with input from Marx, Lafargue and Friedrich Engels, was approved at the opening congress.

Marcel Cachin, who would lead the split in 1920 which led to the creation of the French Communist Party and edited L'Humanité newspaper, became a member of the POF in 1891.

The Nord, Pas-de-Calais, Loire and Allier were the principal bastions of POF electoral strength.