Leon Nowakowski
- categories: vir , martyr , presbyter
- date of birth: 28.06.1913
- date of death: 31.10.1939
- beatification: 13.06.1999 (ceremonially)
- canonization: non-existence
- other Roman Martyrology days: 31.10.
- other memorial days: non-existence
- order: non-existence
- order founder: non-existence
- forenames: Leo
- surnames: Nowakowski
- epithets: non-existence