– after 20 January 1364), was a Polish princess, member of the Piast dynasty in the Cieszyn branch.
Presumably in 1363, she fled from the Trzebnica monastery and began a relationship with John Henry, Margrave of Moravia, brother of Emperor Charles IV.
By a letter dated on 20 January 1364, Pope Urban V demanded of the Bishop of Wrocław, Przecław of Pogarell, that he convince Elisabeth to break her concubinage with the Margrave of Moravia and return to the Trzebnica monastery.
Soon afterwards, the liaison between Elisabeth and John Henry ended, and by 26 February 1364 the Margrave of Moravia was married for the third time, to Margareta, daughter of Albert II, Duke of Austria.
Elisabeth's later fate is unknown, as are the date of her death and the place of her burial.