The Earl holds the subsidiary titles of Viscount Lymington (1720) and Baron Wallop (1720), both in the Peerage of Great Britain.
Earls of Portsmouth (1743) John Wallop, 1st Earl of Portsmouth (1690-1762) John Wallop, 2nd Earl of Portsmouth (1742-1797) John Charles Wallop, 3rd Earl of Portsmouth (1767-1853) Newton Fellowes, 4th Earl of Porstmouth (1772-1854) Isaac Newton Wallop, 5th Earl of Portsmouth (1825-1891) Newton Wallop, 6th Earl of Portsmouth (1856-1917) John Fellowes Wallop, 7th Earl of Portsmouth (1859-1925) Oliver Henry Wallop, 8th Earl of Portsmouth (1861-1943) Gerard Vernon Wallop, 9th Earl of Portsmouth (1898-1984) Quentin Gerard Carew Wallop, 10th Earl of Portsmouth (b. 1954)
