Karl Meyer may refer to:
Karl Meyer (activist) (born 1937), American pacifist, activist, Catholic worker and tax resister Karl Meyer (aviator) (1894–1917), World War I flying ace Karl Meyer (biochemist) (1899–1990), German biochemist Karl Meyer (businessman) (1888–1971), Norwegian businessman, stockbroker and fascist Karl E. Meyer (1937–2019), American journalist Karl Friedrich Meyer (1884–1974), Swiss-born American pathologist Karl Meyer-class seaplane tender, a Second World War-era ship Karl Meyer (footballer) (born 1894), Swiss national team footballer
See also Karl Mayer (character), a fictional character on the U.S. TV series Desperate Housewives Karl Mayer (poet) (1786–1870), German poet Carl Meyer (disambiguation) Carl Mayer (disambiguation) Karl Maier (disambiguation)