Wilhelm Tönnis
German neurosurgeon

- Born: 1898-06-16 (Kley)
- Died: 1978-09-12 (Cologne)
- Country of citizenship: Germany
- Occupation: neurologist; neurosurgeon; surgeon
- Member of political party: Nazi Party
- Member of: German Academy of Sciences Leopoldina
- Participant in: Nuremberg Medical Trial (date: 1947-01-19; role: affiant)
- Significant person: Oskar Schröder (role: colleague)
- Employer: Knappschaftskrankenhaus Bochum-Langendreer (date: 1947-01-01; role: chief physician, director)
- Educated at: University of Hamburg; University of Marburg
- VIAF ID: https://viaf.org/viaf/84841657
- ISNI: https://isni.org/isni/0000000081607031
- WorldCat Identities ID: https://worldcat.org/identities/lccn-n85117002
- Library of Congress authority ID: https://id.loc.gov/authorities/names/n85117002