The title of Viscount Valentia was created in the Peerage of Ireland in 1622. For some time in the 17th and 18th centuries, its holders were also Earls of Anglesey, but this title became extinct in 1761.
The Viscount holds the subsidiary title of Baron Mountnorris (1628), also in the Peerage of Ireland. The 11th Viscount was created Baron Annesley of Bletchington in the Peerage of the United Kingdom in 1917, but this title became extinct on the death of the 12th viscount in 1949.
Viscounts Valentia, First Creation (1621)
Viscounts Valentia (1622)
- Francis Annesley, 1st Viscount Valentia (1583-1660)
- Arthur Annesley, 1st Earl of Anglesey, 2nd Viscount Valentia (1614-1686)
- James Annesley, 2nd Earl of Anglesey, 3rd Viscount Valentia (1645-1690)
- James Annesley, 3rd Earl of Anglesey, 4th Viscount Valentia (1674-1702)
- John Annesley, 4th Earl of Anglesey, 5th Viscount Valentia (1676-1710)
- Arthur Annesley, 5th Earl of Anglesey, 6th Viscount Valentia (d. 1737)
- Richard Annesley, 6th Earl of Anglesey, 7th Viscount Valentia (1690-1761)
- Arthur Annesley, 1st Earl of Mountnorris, 8th Viscount Valentia (1744-1816)
- George Annesley, 2nd Earl of Mountnorris, 9th Viscount Valentia (1770-1844)
- Arthur Annesley, 10th Viscount Valentia (1785-1863)
- Arthur Annesley, 11th Viscount Valentia (1843-1927)
- Caryl Arthur Annesley, 12th Viscount Valentia (1883-1949)
- William Monckton Annesley, 13th Viscount Valentia (1875-1951)
- Francis Dighton Annesley, 14th Viscount Valentia (1888-1983)
- Richard John Dighton Annesley, 15th Viscount Valentia (b. 1929)