Arthur O'Leary may refer to:
Arthur A. O'Leary (1887–1962), American Jesuit educator and president of Georgetown University Arthur O'Leary (preacher) (1729–1802), Irish Franciscan preacher and polemical writer Arthur O'Leary (composer) (1834–1919), Irish composer and pianist Arthur O'Leary (soldier) (1746–1773), Irish soldier in the Austro-Hungarian army