Karl Koch
Karl Koch may refer to:
- Carl Koch , also spelled Karl Koch, German film director, writer
- Karl Koch , German botanist
- Karl Koch , German cyclist
- Karl Koch , member of the Fallschirmjäger during World War II and recipient of the Knight's Cross of the Iron Cross
- Karl Koch , German computer hacker from the 1980s
- Karl Koch , roadie and historian of the band Weezer
- Karl-Otto Koch, commandant of the Nazi concentration camp at Buchenwald
- Karl-Rudolf Koch, German geodesist
- Karl Christian Koch, Danish swimmer