Guillaume François-Gabriel Lépaulle (21 January 1804, Versailles – 28 August 1886, Aÿ) was a French painter associated with the Barbizon school. He painted landscapes historical works and genre scenes, although his best known works are portraits.
Despite these scenes, ranging from the tragic to the picturesque, to the humorous, most were judged to have little merit. His high regard stems largely from his portraits, in the gallery at the Palace of Versailles, representing Napoléon III, Admiral Henri de Rigny, Anne-Charles Lebrun [fr] (Duc de Plaisance) and many other prominent figures.