Helmut Johannsen
German dentist and Waffen-SS officer
- Born: 1908-01-28 (Neumünster)
- Died: 2000-01-01
- Country of citizenship: Germany
- Occupation: concentration camp guard; dentist
- Member of political party: Nazi Party
- Member of: Schutzstaffel
- Participant in: Pohl Trial (date: 1947-08-19; role: affiant)
- Significant person: Hermann Pook (role: colleague)
- Military branch: Waffen-SS (military rank: Obersturmbannführer)
- Place of detention: Nuremberg Court Prison (date: 1947-08-19)
- VIAF ID: https://viaf.org/viaf/28038024
- ISNI: https://isni.org/isni/0000000018618125
- WorldCat Identities ID: https://worldcat.org/identities/viaf-28038024