Margarete Kühn (4 February 1902 – 12 September 1995) was a German author and art historian.

In 1946, after her brother's death and World War II, Kühn wanted to become a nun at Eibingen Abbey.

Kühn was a researcher on the Monumenta Germaniae Historica, a project to gather all German texts from the Roman era to AD 1500.

She used her work on this project as cover to photograph and remove Bingen's Wiesbaden Codex or Riesencodex from Soviet state control in Dresden and have her friend Caroline Walsh deliver it to Eibingen Abbey.

A trade was agreed and other valuable books sent to Dresden in exachange for the codex remaining at the State Library of Wiesbaden.

'[5] Kühn was awarded the Great Federal Cross of Merit and the Ernst Reuter Plaque.