John Lynch may refer to:

• John Lynch (dean of Canterbury) (1697–1760), Anglican priest
• John Lynch (historian) (1927–2018), historian of the Spanish American revolutions
• John Lynch (linguist) (1946–2021), professor at the University of the South Pacific in Port Vila, Vanuatu
• John Lynch (Gratianus Lucius) (1599?–1677), historian and Archdeacon of Tuam
• John Joseph Lynch (1816–1888), Roman Catholic bishop and archbishop of Toronto
• John Lynch (archdeacon of Canterbury) (1735–1803), Archdeacon of Canterbury
• John Lynch (bishop of Elphin), Irish Anglican bishop

• John Lynch (actor) (born 1961), actor from Northern Ireland
• Johnny Lynch, Scottish musician
• John Carroll Lynch (born 1963), American actor

• John Lynch (Maine politician) (1825–1892), U.S. congressman from Maine
• John Lynch (New Hampshire governor) (born 1952), former governor of U.S. state of New Hampshire, 2005–2013
• John Lynch (Pennsylvania politician) (1843–1910), U.S. congressman from Pennsylvania
• John A. Lynch Jr. (born 1938), New Jersey politician, convicted of fraud
• John A. Lynch Sr. (1908–1978), New Jersey politician
• John A. Lynch (New York politician), American businessman and politician from New York
• John C. Lynch, speaker of the California State Assembly
• John D. Lynch (1883–1963), mayor of Cambridge, Massachusetts
• John R. Lynch (1847–1939), African-American Republican Mississippi politician after the American Civil War
• John M. Lynch (died 1984), American mayor of Somerville, Massachusetts

• John Lynch (Australian politician) (1862–1941), member of the Australian House of Representatives, 1914–1919
• John Lynch (New South Wales politician) (1875–1944), member of the New South Wales Legislative Assembly, 1907–1913
• John Lynch (Kerry politician) (1889–1957), Irish Fine Gael party TD for Kerry North, later Senator
• John Lynch (mayor), mayor of Galway, 1489–90
• John Óge Lynch, mayor of Galway, 1551–52

• John Lynch (American football) (born 1971), American football executive and former player
• John Lynch (Tyrone Gaelic footballer) (born 1962), former Tyrone Gaelic footballer
• John Lynch (Roscommon Gaelic footballer) (1933–2019), Irish Gaelic footballer
• John Lynch (Cork Gaelic footballer) (1890–1930), Irish Gaelic footballer

• John Lynch (Fenian) (1832–1866), Irish nationalist
• John Lynch (radio), founder and president of Broadcast Company of the Americas
• John Lynch (serial killer) (1813–1842), Australian colonial-era serial killer
• John Lynch (1740–1820), founder of the city of Lynchburg, Virginia

• John A. Lynch (ferryboat), a ferryboat built in 1925
• Jack Lynch (disambiguation)