Theo Lang
German psychiatrist, geneticist and racial hygienist (1898-1957)
- Born: 1898-07-26 (Augsburg)
- Died: 1957-11-25 (Munich)
- Country of citizenship: Germany
- Occupation: geneticist; psychiatrist; racial hygienist
- Member of political party: Nazi Party
- Member of: Sturmabteilung
- Employer: Max Planck Institute of Psychiatry
- Educated at: Ludwig Maximilian University of Munich
- VIAF ID: https://viaf.org/viaf/35564690
- ISNI: https://isni.org/isni/0000000053035902
- WorldCat Identities ID: https://worldcat.org/identities/lccn-no2003005629
- Library of Congress authority ID: https://id.loc.gov/authorities/names/no2003005629