Duke Ulrich of Schleswig (c. 1480–1530) was a nobleman from the House of Oldenburg, a prominent family in Northern Europe. He served as the Duke of Schleswig and Holstein, regions in present-day Denmark and Germany. His reign was marked by political struggles and conflicts, particularly with the Danish crown. Ulrich's rule was characterized by his efforts to strengthen his territories and maintain autonomy. He faced challenges from rival factions and external powers, which often led to military confrontations. Despite these difficulties, Ulrich's legacy is remembered for his attempts to navigate the complex political landscape of his time.