John Casey
John Casey may refer to:
- John Casey (academic), British academic and writer for The Daily Telegraph
- John Casey (Chuck), fictional character portrayed by Adam Baldwin on the television show Chuck
- John Casey (commentator), Australian journalist and sports broadcaster
- John Casey (footballer), Dumbarton FC player
- John Casey (mathematician), Irish geometer
- John Casey (politician), Newfoundland politician
- John Casey (novelist), American novelist and translator
- John Casey (rugby league), rugby league footballer of the 1920s and 1930s
- John J. Casey, Democratic member of the U.S. House of Representatives from Pennsylvania
- John Casey (climate change author), American author
- John Casey (Australian convict), Irish rebel transported to Australia in 1826
- John Keegan Casey, Irish poet, orator and republican
- John Sears Casey, member of the Alabama House of Representatives
- Captain John C. Casey, who gave his name to Fort Casey in Florida
- Jack Casey, member of the New Jersey General Assembly