Mary Austin may refer to:
People Mary Brown Austin (1768–1824), mother of Texan pioneer Stephen F. Austin Mary Hunter Austin (1868–1934), American writer of fiction and non-fiction Mary Therese Austin (d. 1889), American theater critic; tennis club founder Mary V. Austin (1900–1986), Australian community worker and political activist Mary Austin (heiress) (born 1951), closest friend and common-law wife of British singer-songwriter Freddie Mercury Mary Austin, wife of Brewster Kahle and co-founder of the Kahle/Austin Foundation Mary Austin, pseudonym of American science fiction writer Jane Rice Mary-Austin Klein (born 1964), American landscape painter
Other Mount Mary Austin, mountain in California's Sierra Nevada range
See also Mary Austin Holley (1784–1846), American historical writer