John Brennan
# John Brennan

John Brennan may refer to:

## Public officials

* Jack Brennan (born 1937), U.S. Marine officer and aide of Richard Nixon
* John Brennan (CIA officer) (born 1955), former CIA Director
* John P. Brennan (1864–1943), Democratic politician in the U.S. state of Ohio
* John Brennan Hussey (born 1934), former mayor of Shreveport, Louisiana
* John Joseph Brennan (1913–1976), Northern Ireland politician
* John Brennan (Irish senator) (1901–1977), Fianna Fáil politician
* John A. Brennan Jr. (born 1945), American lobbyist and Massachusetts politician

## Sports

* J. J. Brennan (died 1944), Irish hurler
* John Brennan (Derry Gaelic footballer) (born 1942), Gaelic football manager and player
* John Brennan (Kerry Gaelic footballer), former Gaelic footballer
* Jack Brennan (footballer, born 1892) (1892–1942), English footballer for Bradford City and Manchester City
* John Brennan (American football) (1913–1982), American football player
* Jack Brennan (baseball) (1862–1914), American baseball catcher
* John Brennan (athlete) (1879–1964), American track and field athlete

## Artists

* Johnny Brennan (born 1961), American actor, screenwriter and voice actor
* John Wolf Brennan (born 1954), Irish pianist, organist and composer

## Other people

* John J. Brennan (businessman) (born 1954), chairman and CEO of The Vanguard Group
* John Calder Brennan (1908–1996), U.S. historian
* John Brennan (doctor) (c. 1768–1830), Irish doctor
* Sidney Czira (1889–1974), Irish journalist and revolutionary known by her pen name "John Brennan"
* John N. H. Brennan (1914–2010), Irish author, huntsman and solicitor
* John P. Brennan (priest), first American Catholic priest to declare bankruptcy
* John W. Brennan, United States Army general
