Justin McCarthy
Justin McCarthy may refer to:
- Justin McCarthy (politician), Irish nationalist, historian and UK Member of Parliament
- Justin McCarthy (ice hockey), US ice hockey player
- Justin McCarthy (artist), American artist
- Justin McCarthy (footballer), Australian rules footballer
- Justin McCarthy (hurler), former Irish hurling manager and player
- Justin McCarthy (American historian), American demographer and professor of history
- Justin McCarthy (dancer), American-born Bharatanatyam dancer
- Justin Huntly McCarthy, Irish nationalist and UK Member of Parliament
- Fred McCarthy (cartoonist), American cartoonist
- Justin McCarthy, Viscount Mountcashel, Jacobite general in the Williamite War in Ireland
- Justin J. McCarthy, American prelate of the Roman Catholic Church
- Justin C. McCarthy Irish risk manager, Chief Executive of the Professional Risk Managers' International Association