Denzil Onslow of Stoughton (c. 1698 – 15 November 1765) of Mickleham, Surrey was a British politician.
A member of the influential Onslow family of Surrey, he held a number of lucrative Government posts, and died owing a relatively large sum to the Treasury through mismanagement of his accounts.
They had three sons:[1] Denzil succeeded his second cousin Richard Onslow in 1727 as receiver general of the Post Office when the latter wished to enter Parliament on the family interest at Guildford.
Denzil, in turn, gave up the office when he, too, entered Parliament for Guildford in 1740 at a by-election, triggered when his nephew Richard succeeded to a peerage.
[1] In 1753, he inherited Kevington Hall (which has been remodelled internally into the county primary school of St Mary Cray, Greater London)[3] from his first cousin, Richard Manning.