John McCarthy
John McCarthy may refer to:
Government
- John George MacCarthy, Member of Parliament for Mallow constituency, 1874–1880
- John McCarthy , Member of Parliament for the Mid Tipperary constituency, 1892–1893
- John H. McCarthy, U.S. Representative from New York
- John McCarthy , Nebraska Republican politician
- John F. McCarthy, California Republican senator
- John J. McCarthy , New Jersey General Assembly member
- John V. McCarthy, member of the Ohio House of Representatives
- John Thomas McCarthy, U.S. ambassador
- John McCarthy , Australian ambassador to Vietnam, Mexico, Thailand, the United States, Indonesia, India and Japan
- John A. McCarthy, Australian ambassador to the Holy See
- John Keith McCarthy, Australian public servant in the Territory of Papua and New Guinea
Humanities and science
- John McCarthy , American computer scientist
- John McCarthy , American phonologist
- John D. McCarthy, American sociologist
- John McCarthy , mathematician
- John F. McCarthy Jr., American scientist and engineer
Sports
- John McCarthy , American football player
- John McCarthy , mixed martial arts referee
- Johnny McCarthy, American basketball player and coach
- Johnny McCarthy , American baseball player
- John McCarthy , Dublin Gaelic footballer
- John McCarthy, who played in the 1964 All-Ireland Senior Football Championship final
- John McCarthy , American ice hockey player and coach
- John McCarthy, Paralympic athlete from Ireland
- John McCarthy , American soccer player
- John McCarthy, player with Fitzroy and North Melbourne
- John McCarthy , Port Adelaide and Collingwood player
- John McCarthy , American sprinter, 1934 All-American for the USC Trojans track and field team
Religious states
- John E. McCarthy, Roman Catholic bishop of the Diocese of Austin
- John McCarthy , bishop of Cloyne
- John McCarthy, bishop of Sandhurst in Victoria, Australia
- John McCarthy , Dean of Clogher, 1989–1994
- John Joseph McCarthy, Irish-born bishop to Nairobi, Kenya
Musicians
- John McCarthy, guitarist
- John McCarthy , Canadian composer
- John McCarthy , conductor of choral music
Others
- John McCarthy , British hostage and journalist
- John McCarthy Jr., Oscar-nominated set decorator
- John Edward McCarthy, American radio personality
- John P. McCarthy, American director and screenwriter