Elizabeth of Holstein-Rendsburg (c. 1300[1] – before 1340[2]) was the regent of the Duchy of Saxe-Lauenburg during the minority of her son from 1321 until 1330. She was by two consecutive marriages, duchess of Saxe-Lauenburg and queen of Denmark by marriage (1330–1331) to Eric Christoffersen, son of Christopher II of Denmark.
In 1330, Duchess Elizabeth married Eric,[3] junior king of Denmark, the son of her brother Gerhard's enemy, King Christopher II of Denmark. The couple had no children and the marriage was dissolved the next year. Her former husband died in war with Holstein in 1332.