Elisabeth of Austria, Duchess of Lorraine

Elisabeth of Austria (c. 1285–1352), known in Lorraine as Isabelle, was a daughter of King Albert I of Germany and sister of Frederick the Fair. A proposed French marriage was cancelled, and in 1307 she married Frederick IV of Lorraine, which put the duchy behind her brother's claim to the empire.

At Mühldorf in 1322 her husband was captured fighting for Frederick, and the French king secured his release. Widowed in 1328, she became regent of Lorraine for her young son Rudolph.

The regency ended when Rudolph married Eleanor of Bar and power passed to Eleanor's father. Of her six children only Rudolph and Margaret grew up. She died at Nancy on 19 May 1352 and was buried at Königsfelden.