Mary Agnes

Mary Agnes may refer to:


 * Mary Agnes Bishop (1857–1934), American journalist and newspaper editor- and publisher
 * Mary Agnes Briand (1870–1955), French Catholic nun and Marist missionary in Fiji
 * Mary Agnes Canty (1879–1950), Australian-born New Zealand Roman Catholic nun, teacher, and nursing school matron
 * Mary Agnes Donoghue (born 1943), American screenwriter and director
 * Mary Agnes Hickson (1821–1899), Irish antiquarian and genealogist
 * Mary Agnes Moroney (1928–2003), American woman who, as a child, was kidnapped
 * Mary Agnes Snively (1847–1933), Canadian nurse
 * Mary Agnes Tincker (1833–1907), American novelist
 * Mary Agnes Wall (1919–1983), American golfer
 * Mary Agnes Yerkes (1886–1989), American impressionist painter, photographer, and artisan