Hanna Neumann
| Johanna (Hanna) Neumann | |
|---|---|
| Born | Johanna von Caemmerer 12 February 1914 Lankwitz, Steglitz-Zehlendorf, Germany | 
| Died | 14 November 1971 (aged 57) | 
| Nationality | German | 
| Citizenship | British, Australian | 
| Alma mater | University of Berlin, University of Göttingen, University of Oxford | 
| Known for | Group theory | 
| Spouse | Bernhard Neumann | 
| Children | Peter M. Neumann, Walter Neumann, Irene Neumann, Daniel Neumann, Barbara Neumann | 
| Awards | Fellowship of the Australian Academy of Science (1969), Fellowship of the Australian College of Educators (1970). | 
| Scientific career | |
| Fields | Mathematics | 
| Institutions | University of Hull, School of Mathematics, University of Manchester, Australian National University | 
| Thesis | Sub-group Structure of Free Products of Groups with an Amalgamated Subgroup | 
| Doctoral advisor | Olga Taussky-Todd | 
Johanna (Hanna) Neumann (née von Caemmerer; 12 February 1914 – 14 November 1971) was a German-born mathematician who worked on group theory.