Karl Pfeffer (disambiguation)
Karl Pfeffer is the name of the following people:
- Karl Pfeffer (1903–1975), Austrian politician (SPÖ)
- Karl Pfeffer-Wildenbruch (1888–1971), German general and SS-Obergruppenführer
- Karl Heinz Pfeffer (1906–1971), German sociologist and folklorist
- Karl-Heinz Pfeffer (physician) (1912–1975), German internist
- Karl-Heinz Pfeffer (* 1939), German geographer
