Thaddeus Dulny
- categories: male , martyr
- date of birth: 08.08.1914
- date of death: 07.08.1942
- beatification: 13.06.1999 (ceremonially)
- canonization: non-existence
- other Roman Martyrology days: 06.08.
- other memorial days: non-existence
- order: non-existence
- order founder: non-existence
- forenames: Thaddaeus
- surnames: Dulny
- epithets: non-existence