John Phelan

John or Jack Phelan may refer to:


 * John J. Phelan (1851–1936), Supreme Knight of the Knights of Columbus and Secretary of the State of Connecticut
 * John J. Phelan (boxing) (1872–1946), American boxing commissioner and military officer who served as chairman of the New York State Athletic Commission and was a Major General in the New York Army National Guard.
 * John J. Phelan Jr. (1931–2012), American financier who served as president and later chairman and chief executive of the New York Stock Exchange
 * John Paul Phelan (born 1978), Irish Fine Gael politician
 * John Leddy Phelan (1924–1976), Beveridge Award-winning author of The People and the King: The Comunero Revolution in Colombia, 1781
 * John Dennis Phelan (1809–1879), jurist and politician in the southern United States
 * Jack Phelan (basketball, born 1925) (1925–2021), American professional basketball player for the Waterloo Hawks and Sheboygan Red Skins
 * Jack Phelan (basketball, born 1954) (1954–2020), American college basketball coach of the University of Hartford