John Wallop, Viscount Lymington (3 August 1718 – 19 November 1749) was a British politician, styled Hon.

[4] Wallop was likewise returned for Whitchurch, where he had inherited an interest through his wife, but chose to sit for Andover.

[5] He sat as a Whig, supporting Robert Walpole's administration, and voted for Giles Earle in his unsuccessful candidacy for chairman of the Committee of Privileges and Elections that year.

In 1743, his father (who had lost a number of local offices in Hampshire on Walpole's fall), was created Earl of Portsmouth, and Wallop adopted the style of Viscount Lymington.

He voted against the Carteret Ministry in 1744 on their bill to hire Hanoverian troops for the War of the Austrian Succession.