Lily Weiser-Aall (18 December 1898 – 26 February 1987), born Elisabeth Augusta Jeanette Weiser, was an Austrian philologist and ethnologist who specialized in Germanic studies.

After gaining her Ph.D., Weiser-Aall held an internship at a museum in Hamburg, and worked as a teacher at a Viennese middle school for girls.

During this time Weisser-All attended scholarly conferences in Sweden and Italy, where she established contacts with folklorists such as Viktor Geramb [de] and Eugen Fehrle.

She was assigned to the Seminar for Religious Studies at the Reichsuniversität Straßburg under Otto Huth, and tasked with translating specialist Scandinavian literature into German.

After World War II, Weiser-Aall was a member of Norsk etnologisk gransking [no] and became the senior conservator at Norwegian Museum of Cultural History.