John Mullen
John Mullen may refer to:
- John Mullen (catcher), baseball player
- John Mullen (baseball executive), baseball executive
- John Mullen (Australian executive), Australian corporate executive
- John J. Mullen (American football), American football coach
- John J. Mullen (mayor), American politician
- John Joseph Mullen, member of the Queensland Legislative Council
- John Kernan Mullen, Irish-American businessman, philanthropist
- John A. Mullen, American judge