John Barrett or Johnny Barrett may refer to:
Clergy John Barrett (bishop) (1878–1946), British clergyman who held high office in the Roman Catholic Church John Barrett (dean of Clonmacnoise) (1929–1996), Irish Anglican priest John Barrett (Hebrew scholar) (1753–1821), Irish Anglican priest John C. A. Barrett (born 1943), Chairman of the World Methodist Council and educator
Military personnel John Barrett (Irish soldier) (died 1693), Irish colonel in the Williamite war John Barrett (Royal Navy officer) (died 1810), Irish captain in the Royal Navy John Cridlan Barrett (1897–1977), English recipient of the Victoria Cross
Politicians John Barrett (Australian politician) (1858–1928), Australian senator John Barrett (Massachusetts politician) (born 1947), American legislator and former mayor of North Adams John Barrett (Missouri politician) (1915–2000), American legislator John Barrett (Scottish politician) (born 1954), Scottish Liberal Democrat politician and the former Member of Parliament for Edinburgh West John Barrett Jr. (born 1944), Citizen Potawatomi Nation chairman
Scholars John Barrett (energy researcher), British energy and climate change scientist John Barrett (Hebrew scholar) (1753–1821), Irish Anglican priest John C. Barrett (1949–2024), British archaeologist John W. Barrett (mathematician), British mathematician John W. Barrett (physicist), British mathematical physicist
Sportpeople John Barrett (American football) (1899–1966), American football player John Barrett (athlete) (1879–1942), Irish track and field athlete John Barrett (Australian footballer) (1928–2023), Australian rules footballer John Barrett (cricketer) (born 1946), English cricketer John Barrett (ice hockey) (born 1958), Canadian NHL defenceman John Barrett (outfielder) ( 1872), American baseball outfielder John Barrett (tennis) (born 1931), English tennis player and commentator John Barrett (volleyball) (born 1962), Canadian volleyball player Johnny Barrett (American football) (1895–1974), American football player Johnny Barrett (baseball) (1915–1974), American baseball player
Others John Barrett (actor) (1910–1983), British actor John Barrett (conservationist) (1913–1999), British conservationist, author and broadcaster John Barrett (diplomat) (1866–1938), United States ambassador to Siam, Argentina, Panama, and Colombia John Barrett (salon), the brand of beauty and hair salons by hairstylist John Barrett John Barrett, frontman of the band Bass Drum of Death John F. Barrett (born 1949), CEO of Western & Southern Financial Group
See also Jack Barrett (disambiguation) John Barret (disambiguation) John Barrett Kerfoot (1816–1881), American bishop