Josef Mayer
German prosecutor and judge
- Born: 1905-06-25 (Ingolstadt)
- Occupation: judge; lawyer (since: 1932-05-01); prosecutor
- Member of political party: Nazi Party (period: 1932-01-01 through 1945-01-01)
- Participant in: Judges' Trial (date: 1947-01-21; role: affiant); Pohl Trial (role: criminal defense lawyer)
- Significant person: Oswald Rothaug (role: acquaintance); Rudolf Oeschey (role: acquaintance)
- Educated at: Ludwig Maximilian University of Munich; University of Erlangen-Nuremberg
- Residence: Nuremberg (date: 1949-01-01)