Demuth or DeMuth may refer to:
Places Demuth Museum, in Lancaster, Pennsylvania
People Adrien Demuth (born 1991), French chess grandmaster Charles Demuth (1883–1935), American artist Christopher DeMuth (born 1946), American lawyer Dana DeMuth (born 1956), American baseball umpire Ellen Demuth (born 1982), German politician Helene Demuth (1820–1890), Karl Marx's housekeeper Katherine Demuth, American linguist and academic Lisa Demuth (born 1967), American politician Norman Demuth (1898–1968), English composer and music academic