Karl Koch is the name of: Carl Koch (director) (1892–1963), also spelled Karl Koch, German film director, writer Karl Koch (botanist) (1809–1879), German botanist Karl Koch (cyclist) (1910-1944), German cyclist Karl Koch (Fallschirmjäger) (1918–1944), member of the Fallschirmjäger during World War II and recipient of the Knight's Cross of the Iron Cross Karl Koch (hacker) (1965–1989), German computer hacker from the 1980s Karl Koch (born 1969), roadie and historian of the band Weezer Karl-Otto Koch (1897–1945), commandant of the Nazi concentration camp at Buchenwald Karl-Rudolf Koch (born 1935), German geodesist Karl Christian Koch (born 1952), Danish swimmer See also Carl Koch (disambiguation)