List of Famous people with last name Portsmouth

Isaac Newton Wallop, 5th Earl of Portsmouth MA DL JP(11 January 1825 - 4 October 1891) was a British Peer and the son of Newton Fellowes, 4th Earl of Portsmouth and Lady Catharine Fortescue.

Louise Renée de Penancoët de Kéroualle, Duchess of Portsmouth was a mistress of Charles II of England.

John Wallop, 2nd Earl of Portsmouth, styled Hon. John Wallop from 1743 to 1749 and Viscount Lymington from 1749 to 1762, was a British nobleman.

Newton Fellowes, 4th Earl of Portsmouth was an English politician, styled Hon. Newton Wallop until 1794 and Hon. Newton Fellowes from 1794 to 1853. He was Member of Parliament (MP) for Andover from 1802 to 1820, and MP for North Devon from 1832 to 1837.

John Wallop, 1st Earl of Portsmouth, of Hurstbourne Park, near Whitchurch and Farleigh Wallop, Hampshire, known as John Wallop, 1st Viscount Lymington from 1720 to 1743, was a British politician who sat in the House of Commons from 1715 to 1720, when he vacated his seat on being raised to the peerage as Viscount Lymington and Baron Wallop.

John Charles Wallop, 3rd Earl of Portsmouth, styled Viscount Lymington until 1797, was a British nobleman and lunatic.