Mary Augusta may refer to:
Mary Augusta Hickey (1887–1923), American wife of P. J. Kennedy Mary Augusta Mullikin (1874–1964), American painter Mary Augusta Safford (1851–1927), American Unitarian minister Mary Augusta Stewart Houston, birth name of Stewart Bagnani (1903–1996), Canadian administrator Mary Augusta Tappage (1888–1978), Shuswap-Métis elder, midwife, and storyteller Mary Augusta Wakefield (1853–1910), British composer, contralto, festival organiser, and writer Mary Augusta Yohé (1866–1938), American musical theatre actress