Mamie Gwinn Hodder | |
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| Born | Mary Mackall Gwinn February 2, 1860 Baltimore, Maryland |
| Died | November 11, 1940 Princeton, New Jersey |
| Occupation | Educator |
| Spouse | Alfred Hodder (1904–1907) |
| Partner | M. Carey Thomas (1880s–1904) |
| Relatives | Reverdy Johnson (grandfather) John Johnson Sr. (great-grandfather) William R. Travers (uncle) |
Mary Mackall "Mamie" Gwinn Hodder (February 2, 1860 – November 11, 1940) was an American educator. She taught at Bryn Mawr College, and was one of the founders of the Bryn Mawr School in Baltimore. Her relationships with M. Carey Thomas and Alfred Hodder were fictionalized in Gertrude Stein's short novel Fernhurst (1905).