Mary Barr (1925–2010) was an American aviator, safety officer, mechanic, and flight instructor. Mary Barr may also refer to:
- Mary Barr Clay (1839–1924), American suffragist and farmer
- Mary Barr Mackinlay (1910–1974), Australian Roman Catholic nun and teacher
- Mary Barr Munroe (1852–1922), Scottish-born American clubwoman and conservationist
This disambiguation page lists articles about people with the same name.
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