John McCarthy

• John George MacCarthy (1829–1892), Member of Parliament for Mallow constituency, 1874–1880
• John McCarthy (Irish politician) (1862–1893), Member of Parliament for the Mid Tipperary constituency, 1892–1893
• John H. McCarthy (1850–1908), U.S. Representative from New York
• John McCarthy (Nebraska politician) (1857–1943), Nebraska Republican politician
• John F. McCarthy (1924–1981), California Republican senator
• John J. McCarthy (New Jersey politician) (1927–2001), New Jersey General Assembly member
• John V. McCarthy (c. 1932–1987), member of the Ohio House of Representatives
• John Thomas McCarthy (born 1939), U.S. ambassador
• John McCarthy (Australian diplomat) (born 1942), Australian ambassador to Vietnam, Mexico, Thailand, the United States, Indonesia, India and Japan
• John A. McCarthy (born 1947), Australian ambassador to the Holy See (2012–2016)
• John Keith McCarthy (1905–1976), Australian public servant in the Territory of Papua and New Guinea

• John McCarthy (computer scientist) (1927–2011), American computer scientist
• John McCarthy (linguist) (born 1953), American phonologist
• John D. McCarthy (born 1940), American sociologist
• John McCarthy (mathematician) (born 1964), mathematician
• John F. McCarthy Jr., American scientist and engineer

• John McCarthy (American football) (1916–1998), American football player
• John McCarthy (referee) (born 1962), mixed martial arts referee
• Johnny McCarthy (1934–2020), American basketball player and coach
• Johnny McCarthy (baseball) (1910–1973), American baseball player
• John McCarthy (Gaelic footballer) (born 1955), Dublin Gaelic footballer
• John McCarthy (Kerry Gaelic footballer), who played in the 1964 All-Ireland Senior Football Championship final
• John McCarthy (ice hockey) (born 1986), American ice hockey player and coach
• John McCarthy (discus thrower), Paralympic athlete from Ireland
• John McCarthy (soccer) (born 1992), American soccer player
• John McCarthy (Australian rules footballer, born 1967), former player with Fitzroy and North Melbourne
• John McCarthy (Australian rules footballer, born 1989) (1989–2012), Port Adelaide and Collingwood player
• J. J. McCarthy (Jonathan James McCarthy, born 2003), American football player
• John McCarthy (sprinter) (born 1910), American sprinter, 1934 All-American for the USC Trojans track and field team

• John E. McCarthy (1930–2018), Roman Catholic bishop of the Diocese of Austin
• John McCarthy (Irish bishop) (1815–1893), bishop of Cloyne
• John McCarthy (Australian bishop), bishop of Sandhurst in Victoria, Australia
• John McCarthy (priest) (born 1938), Dean of Clogher, 1989–1994
• John Joseph McCarthy (1896–1983), Irish-born bishop to Nairobi, Kenya

• John McCarthy (guitarist), guitarist
• John McCarthy (composer) (born 1961), Canadian composer
• John McCarthy (conductor) (1916–2009), conductor of choral music

• John McCarthy (journalist) (born 1956), British hostage and journalist
• John McCarthy Jr. (1912–1994), Oscar-nominated set decorator
• John Edward McCarthy (1911–1977), American radio personality
• John P. McCarthy (1884–1962), American director and screenwriter

• Jack McCarthy (disambiguation)
• Jon McCarthy (born 1970), English former professional footballer
• John McCarty (disambiguation)

{{hndis|Mccarthy, John}}