Marmottan is a surname. Notable people with the surname include:
Anémone Marmottan (b. 1988), French alpine skier Paul Marmottan (1856–1932), French art historian, collector and patron Bibliothèque Marmottan, in Paris, France Musée Marmottan Monet, in Paris, France
See also Louis-Augustin Marmottin (1875–1960), French Catholic bishop