John Meagher

• John Meagher, Irish architect, partner in De Blacam & Meagher
• John Meagher (Canada [East politician)], merchant and politician in Canada East
• John Paul Meagher, developer and political figure in Saskatchewan, Canada
• John Meagher (Australian politician), member of the New South Wales Legislative Council
• John F. Meagher, Australian Thoroughbred racehorse trainer
• John W. Meagher, United States soldier, Medal of Honor recipient
• John Meagher (hurler), Irish hurler