Karl Meyer

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