Bernard MacMahon or McMahon may refer to:
Bernard MacMahon (bishop) (1680–1747), Irish Roman Catholic prelate; Archbishop of Armagh Bernard MacMahon (bible translator) (c. 1736–1816), Irish Catholic priest, who translated the Douay-Rheims New Testament and the complete Bible Bernard McMahon (died 1816), Irish-American horticulturist, most famous for The American Gardener's Calendar Bernard MacMahon (filmmaker), English newspaper writer and music video director Bernard McMahon (murder victim), Irish victim of the McMahon killings
See also MacMahon (disambiguation)