Prince Ulrik of Denmark (2 February 1611 – 12 August 1633) was a son of King Christian IV of Denmark and his consort Queen Anne Catherine of Brandenburg.
As the fourth-born son, he bore the merely titular rank of Duke of Holstein and Schleswig, Stormarn and Ditmarsh; however, he had no share in the royal-ducal condominial rule of Holstein and Schleswig, wielded by the heads of the houses of Oldenburg (royal) and its cadet branch Holstein-Gottorp (ducal).
In 1624 Ulrik was appointed administrator of the Prince-Bishopric of Schwerin as Ulrich III.
However, in 1628 Wallenstein's conquest of the prince-bishopric de facto deposed him.
His father had to renounce all his family claims to prince-bishoprics in 1629.
When in 1631 Swedish forces reconquered the prince-bishopric Ulrik failed to reascend as administrator.