Countess Elisabeth of Nassau-Dillenburg (25 September 1542, Dillenburg – 18 November 1603, Dillenburg) was a daughter of William I, Count of Nassau-Siegen and Juliana of Stolberg and one of the sisters of William the Silent.

On 16 June 1559, she married Count Conrad of Solms-Braunfels at the age of 16.

They had 14 children, nine of whom lived to adulthood: Amalia of Solms-Braunfels, a daughter of her eldest son John Albert I, married her nephew Frederick Henry, Prince of Orange.

Maria Amalia of Nassau-Dillenburg, the second wife of her son William I, was a daughter of Elisabeth's brother John VI, Count of Nassau-Dillenburg from his second marriage to Kunigunde Jakobäa of Simmern, so Elisabeth was both Maria's aunt and her mother-in-law.

This article about a German countess is a stub.