Karl Helfferich
German diplomat (1872-1924)
- Born: 1872-07-22 (Neustadt an der Weinstraße)
- Died: 1924-04-23 (Bellinzona)
- Country of citizenship: Germany
- Occupation: banker; diplomat; economist; jurist; politician; university teacher
- Member of political party: German National People's Party
- Member of: Royal Swedish Academy of Sciences
- Position held: ambassador; member of the Reichstag of the Weimar Republic
- Employer: Humboldt University of Berlin
- Educated at: Frederick William University; Ludwig Maximilian University of Munich; University of Strasbourg
- VIAF ID: https://viaf.org/viaf/27163099
- ISNI: https://isni.org/isni/000000011610999X
- WorldCat Identities ID: https://worldcat.org/identities/lccn-n90686347
- Library of Congress authority ID: https://id.loc.gov/authorities/names/n90686347