The title of Baron Grey de Ruthyn (sometimes spelt Ruthin) was created in the Peerage of England by writ of summons in 1324 for Roger Grey, a son of John Grey, 2nd Baron Grey of Wilton.

Barons Grey de Ruthyn (1324)

• Roger Grey, 1st Baron Grey de Ruthyn (d. 1353)
• Reginald Grey, 2nd Baron Grey de Ruthyn (1319_1388)
• Reginald Grey, 3rd Baron Grey de Ruthyn (1362_1440)
• Edmund Grey, 4th Baron Grey de Ruthyn, 1st Earl of Kent (1416-1490)
• George Grey, 5th Baron Grey de Ruthyn, 2nd Earl of Kent (d. 1503)
• Richard Grey, 6th Baron Grey de Ruthyn, 3rd Earl of Kent (1478_1523)
• Henry Grey, 7th Baron Grey de Ruthyn, 4th Earl of Kent (d. 1562
• Reginald Grey, 8th Baron Grey de Ruthyn, 5th Earl of Kent (d. 1573)
• Henry Grey, 9th Baron Grey de Ruthyn, 6th Earl of Kent (1541_1615)
• Charles Grey, 10th Baron Grey de Ruthyn, 7th Earl of Kent (1545_1623)
• Henry Grey, 11th Baron Grey de Ruthyn, 8th Earl of Kent (1583_1639)
• Charles Longueville, 12th Baron Grey de Ruthyn (1612_1643)
• Susan Longueville, 13th Baroness Grey de Ruthyn (1634-1676)
• Charles Yelverton, 14th Baron Grey de Ruthyn (1657_1679)
• Henry Yelverton, 15th Baron Grey de Ruthyn, 1st Viscount Longueville (1664-1704)
• Talbot Yelverton, 16th Baron Grey de Ruthyn, 1st Earl of Sussex (1690-1731)
• George Augustus Yelverton, 17th Baron Grey de Ruthyn, 2nd Earl of Sussex (1727-1758)
• Henry Yelverton, 18th Baron Grey de Ruthyn, 3rd Earl of Sussex (1728-1799)
• Henry Edward Yelverton, 19th Baron Grey de Ruthyn (1780-1810)
• Barbara Yelverton, 20th Baroness Grey de Ruthyn (1760-1781)
• Henry Rawdon-Hastings, 21st Baron Grey de Ruthyn, 4th Marquess of Hastings (1842-1868) (abeyant 1868)
• Bertha Lelgarde Rawdon-Hastings, 22nd Baroness Grey de Ruthyn (1835-1887) (abeyance terminated 1885)
• Rawdon George Grey Clifton, 23rd Baron Grey de Ruthyn (1858-1912)
• Cecil Talbot Clifton, 24th Baron Grey de Ruthyn (1862-1934) (abeyant 1934)
• John Lancelot Wykeham Butler-Rowdon, 25th Baron Grey de Ruthyn (1883-1963) (abeyance terminated 1940, abeyant 1963)