Princess Royal was a British blockade runner captured at Charleston, South Carolina on 29 January 1863. She was purchased by the Navy Department from the Philadelphia Prize court 18 March 1863; fitted out as a cruiser; and commissioned 29 May 1863, Commander Melancthon B. Woolsey in command.
Assigned to the West Gulf Blockading Squadron, Princess Royal participated in the engagement with Confederate forces at Donaldsonville, Louisiana, 28 June 1863. Then ordered to the Texas coast, she captured the British schooner Flying Scud near Matamoros 12 August, and assisted in seizing the schooner Wave 22 August. Continuing her patrols into 1864 she took Neptune off Brazoa de Santiago, 19 November 1864; ran down the schooner Flash six days later; seized the schooner Alabama, 7 December; and captured Cora off Galveston, 19 December.
On 7 February 1865, she assisted in the capture of her last prize, the schooner Anna Sophia in Galveston Bay. Five months later Princess Royal was ordered north, arriving at Philadelphia 21 July. She was sold at public auction 17 August 1865.