Karl S. Bader
German legal historian, regional historian, archivist and lawyer (1905-1998)
- Born: 1905-08-27 (Titisee-Neustadt)
- Died: 1998-09-13 (Zürich)
- Country of citizenship: Germany
- Occupation: archivist; lawyer; legal historian; regional historian; university teacher
- Member of: Heidelberg Academy for Sciences and Humanities (role: corresponding member; since: 1972-01-01)
- Employer: Johannes Gutenberg University Mainz; University of Zurich
- VIAF ID: https://viaf.org/viaf/7419944
- ISNI: https://isni.org/isni/0000000108548941
- WorldCat Identities ID: https://worldcat.org/identities/lccn-n84035522
- Library of Congress authority ID: https://id.loc.gov/authorities/names/n84035522