John Phelan
John or Jack Phelan may refer to:
- John J. Phelan, Supreme Knight of the Knights of Columbus and Secretary of the State of Connecticut
- John J. Phelan (boxing), 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., American financier who served as president and later chairman and chief executive of the New York Stock Exchange
- John Paul Phelan, Irish Fine Gael politician
- John Leddy Phelan, Beveridge Award-winning author of The People and the King: The Comunero Revolution in Colombia, 1781
- John Dennis Phelan, jurist and politician in the southern United States
- Jack Phelan (basketball, born 1925), American professional basketball player for the Waterloo Hawks and Sheboygan Red Skins
- Jack Phelan (basketball, born 1954), American college basketball coach of the University of Hartford
- John Phelan (businessman), American businessman and the 79th Secretary of the United States Navy