Landmann is a surname. Notable people with the surname include:
- Barbara Heinemann Landmann (1795–1883), German spiritual leader
- Ludwig Landmann (1868–1945), first Jewish Mayor of Frankfurt
- George Thomas Landmann (1779–1854), British civil engineer
- Salcia Landmann (1911–2002), Austrian-born Jewish writer and wife of the philosopher Michael Landmann
- Valentin Landmann (1950-), Swiss criminal defence attorney and politician, son of Salcia Landmann