Mary Spencer (disambiguation)

Mary Spencer may also refer to:
 * Mary Spencer (born 1984), Canadian boxer
 * Mary C. Spencer (1842–1923), American librarian
 * Mary Spencer Nay (1913–1993), American painter and printmaker
 * Mary Spencer (photographer) (1857–1938), Canadian photographer
 * Mary Spencer Watson (1913–2006), English sculptor

Fictional characters

 * Mary Spencer, in the Japanese anime series Trinity Blood