John Mullen

John Mullen may refer to:
 * John Mullen (catcher), baseball player
 * John Mullen (baseball executive) (died 1991)
 * John J. Mullen (American football), football coach
 * John J. Mullen (mayor), politician
 * John Joseph Mullen, member of the Queensland Legislative Council
 * John Kernan Mullen, Irish-American businessman, philanthropist
 * John A. Mullen, American judge