John Welch

John or Jack Welch may refer to:
 * John Welch (colonial administrator), 18th-century governor of Anguilla
 * John Welch (politician) (1805–1891), U.S. representative from Ohio
 * John Welch (architect) (fl. 1880s), Brooklyn-based church architect
 * Jack Welch (illustrator) (1905–1985), American illustrator
 * Johnny Welch (1906–1940), baseball player
 * John J. Welch Jr. (1930–2010), U.S. Assistant Secretary of the Air Force (Acquisition) 1987–1992
 * Sir John Reader Welch, 2nd Baronet (1933–2023), British solicitor and baronet
 * Jack Welch (1935–2020), American business executive and former CEO of General Electric
 * John W. Welch (born 1946), scholar and Brigham Young University professor
 * John Welch (basketball) (born 1963), assistant coach for the Sacramento Kings
 * Jack Welch (American football) (fl. 1980s–2010s), former head football coach Kansas Wesleyan University Coyotes
 * Jack Welch (field hockey) (born 1997), Australian field hockey player
 * Jack Welch, referee who made the controversial Mexican Joe Rivers call
 * Jack Welch (admiral) (1941–2014), Chief of Navy (New Zealand)