John Donahue
John or Jack Donahue may refer to:
- John Donahue (baseball), Major League Baseball right fielder
- Jiggs Donahue, Major League Baseball first baseman and catcher
- Deacon Donahue, Major League Baseball relief pitcher
- John F. Donahue, chairman of Federated Investors
- Jack Donahue, Australian bushranger
- Jack Donahue (American football), American football player and coach
- Jack Donahue (politician), Louisiana state senator from St. Tammany Parish