Schmalhausen
Schmalhausen is the family name of the following people:
- Bernd Schmalhausen (* 1949), German lawyer and judicial historian
- Iwan Iwanowitsch Schmalhausen (1884–1963), Russian zoologist and evolutionary biologist
- Johannes Theodor Schmalhausen (1849-1894), Russian botanist
- Kay Martin Schmalhausen Panizo SCV (* 1964), Peruvian religious, prelate of Ayaviri