John Martin may refer to:
Business
John Martin (businessman) (1820–1905), American lumberman and flour miller
John Charles Martin (1882–1966), American newspaper publisher
John Martin (publisher) (1930–2025), American founder of Black Sparrow Press
John C. Martin (businessman) (1951–2021), CEO of biotechnology company Gilead Sciences
Entertainment
John Martin (actor) (born 1951), American actor
John Martin (painter) (1789–1854), English painter
John Martin (Canadian artist) (1904–1965), British-Canadian etcher and textile printer
John Blennerhassett Martin (1797–1857), American painter, engraver, and lithographer
John Martin (bibliographer) (1791–1855), English bookseller, librarian, and writer
John Martin (dance critic) (1893–1985), at The New York Times
John Scott Martin (1926–2009), English actor
John Martin (Canadian broadcaster) (1947–2006)
John Martin (comedian) (born 1962), British
John Martin (singer) (born 1980), Swedish
John Martin (born 1946), also known as "The Big Figure", English drummer and member of Dr. Feelgood (1971–1982)
John Martin, American film actor, in Browned Off (1944) and Mesa of Lost Women (1951)
John Martin, Norwegian musician, husband and manager of pianist Natalia Strelchenko
Law
John Martin (judge) (1784–1840), American judge of the Cherokee Tribal Court
John C. Martin (judge) (1943–2024), North Carolina state court judge
John Donelson Martin Sr. (1883–1962), U.S. federal judge
John E. Martin (1891–1968), Wisconsin state court judge
John S. Martin Jr. (born 1935), U.S. federal judge
Military
John Donelson Martin (1830–1862), Confederate States Army officer during the American Civil War
John Martin (Royal Navy officer) (1918–2011), British admiral
John Henry Martin (c. 1753–1823]], Royal Navy officer
John Martin (New Zealand admiral), chief of the Royal New Zealand Navy
John L. Martin Jr. (1920–2009) US Air Force general
John Martin (soldier) (1921–2012), Tahitian soldier and linguist
Politics
United Kingdom
John Martin (MP for Berwick-upon-Tweed), British member of parliament for Berwick-upon-Tweed, 1529
John Martin (died 1545), British member of parliament for Plympton Erle, 1529
John Martin (died c. 1592), British member of parliament for Plympton Erle, 1554
John Martin (1692–1767), British member of parliament for Tewkesbury, 1741–1747
John Martin (1724–1794), British member of parliament for Tewkesbury, 1754–1761
John Martin (1805–1880), British banker and member of parliament for Tewkesbury, 1832–1835
John Martin (Young Irelander) (1812–1875), Young Irelander and member of parliament for Meath, 1871–1875
John Hanbury Martin (1890–1983), British member of parliament for Southwark Central, 1940–1948
John Martin (civil servant) (1904–1991), Winston Churchill's private secretary
John Martin (Leicester MP), British member of parliament for Leicester, 1354
John Martin, bailiff of Guernsey, 1499–1510
John Martin (1774–1832), British member of parliament for Tewkesbury, 1812–1832
John Martin (Irish politician), Irish member of parliament for the Irish constituency of Sligo Borough, 1832–1837
United States
John Martin (governor of Georgia) (died 1786)
John Martin (governor of Kansas) (1839–1889)
John Martin (Kansas politician) (1833–1913), U.S. senator from Kansas
John Andrew Martin (1868–1939), U.S. representative from Colorado
John C. Martin (politician) (1880–1952), U.S. representative from Illinois
John F. Martin Jr., American ambassador to Costa Rica (1920–1921)
John L. Martin (born 1941), American politician from Maine
John Marshall Martin (1832–1921), Confederate politician
John Mason Martin (1837–1898), U.S. representative from Alabama
John Preston Martin (1811–1862), U.S. representative from Kentucky
John W. Martin (1884–1958), governor of Florida