Helmut Kallmeyer
German chemist
- Born: 1910-10-08 (Hamburg)
- Died: 2006-09-27
- Country of citizenship: Germany
- Occupation: chemist; torturer
- Member of: Sturmabteilung
- Participant in: Aktion T4; Nuremberg Medical Trial (date: 1947-06-20; role: affiant)
- Significant person: Viktor Brack (role: acquaintance)
- Educated at: Technical University of Berlin
- Spouse: Gertrud Kallmeyer
- VIAF ID: https://viaf.org/viaf/45251437
- ISNI: https://isni.org/isni/0000000019192648
- WorldCat Identities ID: https://worldcat.org/identities/viaf-45251437