Karl Geissler
Karl Geissler or Karl Geißler is the name of the following people:
- Karl Geißler (major general) (1858–1941), German major general
- Karl Geißler (politician) , German politician, member of the Provisional People's Chamber in 1949
- Karlheinz Geißler (* 1944), German economic and social pedagogue
- Karl Wilhelm Geissler (1863–1904), German editor and writer