Karl Diehl
Karl Diehl may refer to:
- Karl Ludwig Diehl (1896–1958), German film actor
 - Karl Diehl (economist) (1864–1943), German economist and professor
 
See also
- Carl Diehl (1904–1997), American college football player
 - Diehl (disambiguation)
 
Karl Diehl may refer to: