John Long may refer to:
Politicians
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John Long (MP for Cricklade)
John Long of Draycot Cerne (c. 1419 – 20 September 1478) was an English landed gentry, landowner and member of parliament.
Born in Wiltshire, the son of Robert Long (lawyer and landowner), Robert Long and Margaret Godfrey, he was elected me ...
(c. 1419–1478), English member of parliament for Cricklade
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John Long (16th-century MP) (c. 1517 – c. 1600/1602), MP for Knaresborough, Hedon, Shaftesbury and Newcastle-under-Lyme
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John Long (North Carolina politician) (1785–1857), U.S. representative from North Carolina
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John Davis Long (1838–1915), governor of Massachusetts, later the U.S. Secretary of the Navy
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John B. Long (1843–1924), U.S. representative from Texas
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John A. Long, Australian paleontologist
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John Andrew Long (1869–1941), senator in Northern Ireland
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John David Long (1901–1967), South Carolina state senator
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John H. Long (political candidate) (fl. late 20th – early 21st centuries), Canadian political figure
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J. H. Long (John Henry Long, 1845–1898), American politician in Washington State
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John V. Long (1826–1869), member of the Utah territorial legislature and clerk for Brigham Young
Religion
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John Longe (1548–1589), English Protestant archbishop of Armagh
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John Longe (priest) (1765–1834), priest and county magistrate
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John Long (evangelist) (1872–1962), Pentecostal preacher
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John Long (priest) (1913–2008), Anglican Archdeacon of Ely
Sports
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John Long (climber) (born 1953), American rock climber and writer
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John Long (basketball player) (born 1956), American basketball player
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Johnny Long (American football) (1914–1975), American football quarterback
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John Long (basketball coach), college men's basketball coach
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John Long (Australian footballer) (born 1946), Australian rules footballer
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John Long (Gaelic footballer) (born 1952), Irish Gaelic footballer
Others
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John Long (artist) (1964–2016), artist and painter from Northern Ireland
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John Long (computer scientist) (1935–2025), British computer scientist
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John Long (blues musician) (born 1950), American country blues singer, fingerstyle guitarist, harmonica player and songwriter
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John Dixon Long (1817–1894), American abolitionist
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John Luther Long (1861–1927), American lawyer and writer whose short story ''Madame Butterfly'' inspired the opera by Puccini
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Johnny Long (musician)
Johnny Long (September 12, 1914 (disputed) – October 31, 1972) was an American violinist and bandleader, known as "The Man Who's Long on Music". He was raised on a farm in Newell, North Carolina, currently a subdivision of Charlotte. He ...
(1914–1972), American violinist and big band leader
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John A. Long (born 1957), Australian paleontologist and author of children's books and popular science and adventure books
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John H. Long (chemist) (1856–1918), president of the American Chemical Society
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John Herbert Long (1904–1985), English music teacher and organist
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John Long Ltd, publisher
{{human name disambiguation, Long, John