Karl Flach
Karl Flach is the name of the following people:
- Karl Flach (engineer) (1821–1866) German engineer and submarine builder
- Karl Flach (zoologist) (also Carl Flach ; 1856–1920), German entomologist
- Karl Flach (entrepreneur) (1905–1997), German entrepreneur
- Karl-Hermann Flach (1929–1973), German journalist and politician (LDPD, FDP)
