Mary Austin

Mary Austin may refer to:
 * Mary Hunter Austin (1868–1934), American writer of fiction and non-fiction
 * Mary V. Austin (1900–1986), Australian community worker and political activist
 * Mary Brown Austin (1768–1824), mother of Texan pioneer Stephen F. Austin
 * Mary Austin (born 1951), closest friend and former girlfriend 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
 * Mount Mary Austin, mountain in California's Sierra Nevada range