Eugen Haagen
German virologist and torturer
- Born: 1898-01-01 (Berlin)
- Died: 1972-01-01 (Berlin)
- Country of citizenship: Germany
- Occupation: physician; torturer; university teacher; virologist
- Member of political party: Nazi Party
- Member of: German Academy of Sciences Leopoldina
- Significant person: Arnold Dohmen (role: assistant); Gerhard Rose (role: superior)
- Employer: Reichsuniversität Straßburg; Robert Koch Institute
- Spouse: Brigitte Crodel
- VIAF ID: https://viaf.org/viaf/27450510
- ISNI: https://isni.org/isni/0000000121001828
- WorldCat Identities ID: https://worldcat.org/identities/lccn-no2015002114
- Library of Congress authority ID: https://id.loc.gov/authorities/names/no2015002114