John Donnelly
John Donnelly may refer to:
- John Donnelly (Australian politician), Australian politician
- John Donnelly (baseball), 19th-century baseball player
- John Donnelly (footballer, born 1936), Scottish footballer
- John Donnelly (footballer, born 1961), Scottish footballer
- John Donnelly (hurler), Irish hurler in Kilkenny
- John Donnelly (ice hockey), Canadian ice hockey defenceman who played in the WHA with the Ottawa Nationals
- John Donnelly (Irish farmer), Irish farmer who was President of the Irish Farmers' Association, 1994–1998
- John Donnelly (rowing), Canadian Olympic rower
- John Donnelly (rugby league), Australian rugby league footballer
- John Donnelly (whaler), New Zealand whaler and gold prospector
- John Aiden Donnelly, Gardaí officer and recipient of the Scott Medal
- John C. Donnelly, American Civil War sailor and Medal of Honor recipient
- John H. Donnelly, American politician and government official
- John J. Donnelly, Vice Admiral in the US Navy
- John P. Donnelly, American politician
- John Donnelly (playwright), author of Going Forward in 2020 UK drama series ''Unprecedented''