John Courtney
John or Jack Courtney may refer to:
- John Edgar Courtney, Australian ornithologist
- J. Ira Courtney, American athlete
- John Mortimer Courtney, Canadian civil servant
- John Courtney (MP), Member of Parliament for Bodmin
- John Courtney (diarist), of Beverley, Yorkshire, England
- John Courtney (playwright), playwright, dramatic actor and comedian
- Jack Courtney (figure skater), American pair skater
- Jack Courtney (rugby league), Australian rugby league player