ONSLOW, Denzil (c.1698-1765), of Mickleham, Surr.

Published in The History of Parliament: the House of Commons 1715-1754, ed. R. Sedgwick, 1970
Available from Boydell and Brewer



24 Nov. 1740 - 1747

Family and Education

b. c.1698, s. of Richard Onslow of Drungewick, Suss. by Sarah, da. of Thomas Calvert, M.P., and gt. gd. s. of Sir Richard Onslow, M.P. m. cos. Anne, da. and coh. of Thomas Middleton, M.P., of Stansted Mountfitchet, Essex by Anne, da. of Sir Richard Onslow, 3rd Bt., 2s. suc. fa. 1712.

Offices Held

Receiver gen. of the Post Office 1727-40; paymaster of the board of Works 1743-55; commr. of stamp duties 1755-7; commr. of the salt office 1757-65.


Denzil Onslow succeeded his cousin Richard Onslow at the Post Office, which he in turn had to resign as incompatible with a seat in the House of Commons when he was returned on his family’s interest for Guildford in 1740. Voting with the Administration in every recorded division, he spoke for the Hanoverians on 18 Jan. 1744.1 He resigned his seat in 1747 in preference to giving up his place at the board of Works, which had become incompatible with a seat in the House under the Place Act of 1742. In 1748 he was called upon to