George Viau (28 March 1855 – 18 December 1939) was a French dentist and art collector.

His collection, which was built up and sold off more than once, included work by many impressionist painters and the artists who influenced them.

Viau's dental practice was at number 47 Boulevard Haussmann, where one of his patients was Claude Monet.

[1][2] The collection sold in 1907 included works by, among others, Boudin, Carrière, Cassatt, Cézanne, Dagnan-Bouveret, Daumier, Degas, Delacroix, Gauguin, Guillaumin, Jongkind, Lebourg, Lépine, Manet, Monet, Morisot, Pissarro, Renoir, Sisley, and Vignon.

[6] A portrait of Viau painted by Édouard Vuillard in 1914 is held at the Musée d'Orsay.