Mary Bettina Linn (1905 – April 7, 1962) was an American writer and college professor.

[3][4] In the 1950s, she was active with the Three-College Russia Committee, and invited speakers to campus, including British theorist Isaiah Berlin[5] and Southern writer Eudora Welty.

[7] During World War II, Linn worked with the Office of Strategic Services in Washington, as a researcher and analyst in the Russia division.

[3][8] Linn published two short stories with patriotic themes in St. Nicholas Magazine when she was a teenager.

[12] A British reviewer said, "Miss Linn has created two beautifully three-dimensional characters who nearly steal the limelight.