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 , Member of Parliament for Bodmin
- John Courtney , of Beverley, Yorkshire, England
- John Courtney , playwright, dramatic actor and comedian
- Jack Courtney , American pair skater
- Jack Courtney , Australian rugby league player