Brian McMahon may refer to:
Brian McMahon (rowing) (born 1961), Canadian coxswain Brian McMahon (hurler), former Irish hurler Brian McMahon (footballer) (born 1939), former Australian rules footballer Brian McMahon (New Zealand Army officer) (1929–2025), New Zealand Army doctor Barney McMahon (Brian McMahon, 1928–2010), Irish Air Corps commander 1984–1989
See also Brien McMahon (1903–1952), American lawyer and politician Bryan McMahon, see Rossington Main Novices' Hurdle Brian MacMahon (disambiguation)