Viscount Hanworth, of Hanworth in the County of Middlesex, is a title in the Peerage of the United Kingdom.^[1]

The title was created on 17 January 1936 for the judge turned Conservative Member of Parliament who achieved the judicial position of Master of the Rolls, Ernest Pollock, 1st Baron Hanworth. He had already been created a Baronet, of Hanworth in the County of Middlesex, on 27 November 1922, in the Baronetage of the United Kingdom,^[2] and Baron Hanworth, of the same territorial designation, on 28 January 1926.^[3] As of 2024^[update] the titles are held by his great-grandson, the third Viscount, who succeeded his father in 1996.

• Ernest Murray Pollock, 1st Baronet (1861–1936) (created Baron Hanworth in 1926)

• Ernest Murray Pollock, 1st Baron Hanworth (1861–1936) (created Viscount Hanworth in 1936)

• Ernest Murray Pollock, 1st Viscount Hanworth (1861–1936)
• David Bertram Pollock, 2nd Viscount Hanworth (1916–1996)
• David Stephen Geoffrey Pollock, 3rd Viscount Hanworth (born 1946)

The heir presumptive is the present holder's nephew, Harold William Charles Pollock (born 1988).

Coat of arms of Viscount Hanworth

Crest A Boar passant quarterly Or and Vert pierced through the sinister shoulder with an Arrow proper Escutcheon Azure three Fleurs-de-lis within a Bordure engrailed Or on a Chief Ermine two Portcullises of the second Supporters On either side a Bear Or muzzled collared and chained Sable Motto Audacter Et Strenue (Boldly and strenuously) [4]

In a poor state of repair the large two-storey brick house was built following a fire in 1797 by the Duke of St Albans. What remained of it was later bought with a few acres of attached lawns and fields by the first Viscount however quickly converted into the London Air Park. The Viscount also transferred his Hanworth Park estate to public benefit in the suburb of Hanworth, London. Its later shape is now a mixture of public grassland and recreational amenities such as sports pitches funded by two local charitable clubs and a leisure centre, built by the London borough.

• Pollock baronets, of Hatton, and Pollock baronets, of The Khyber Pass

• Kidd, Charles, Williamson, David (editors). Debrett's Peerage and Baronetage (1990 edition). New York: St Martin's Press, 1990, ^{[page needed]}
• Leigh Rayment's Peerage Pages ^{[self-published source] [better source needed]}

• Hansard 1803–2005: contributions in Parliament by David Bertram Pollock, 2nd Viscount Hanworth