Jack Lynch (1917–1999) was an Irish politician.
Jack Lynch may also refer to:
Jack Lynch (rugby league) (1900–1966), Australian rugby league footballerJack Lynch (baseball) (1857–1923), baseball playerJack Lynch (ice hockey) (born 1952), Canadian ice hockey playerJack Lynch (West Adelaide footballer), Australian rules footballer for West AdelaideJack Lynch (footballer, born 1905) (1905–1979), Australian rules footballer for North MelbourneJack Lynch (footballer, born 1918) (1918–1944), Australian rules footballer for GeelongJack Lynch (footballer, born 1995), English footballerJack Lynch, mass murderer during the 1840s of the Berrima District who was later hanged at the Berrima Gaol in 1842John J. "Jack" Lynch, database systems project manager and candidate in the United States House of Representatives elections in Michigan, 2010