John McMullen may refer to:
John McMullen (bishop) (1832–1883), first bishop of Davenport, Iowa John McMullen (broadcaster), American radio and internet broadcaster John McMullen (engineer) (1918–2005), engineer and owner of two sports teams John McMullen (politician) (1843–1922), Wisconsin state senator John K. McMullen, USAF officer John A. McMullen (born 1941), Vermont businessman and political candidate
See also John Mullen (disambiguation) John J. McMullen & Associates, a naval architecture firm in the United States Jack McMullen (born 1991), actor