George Cubitt, 1st Baron Ashcombe (4 June 1828 – 26 February 1917) was a British politician, the son of architect Thomas Cubitt.

Educated at Trinity, Cambridge, where he graduated with first a BA and later an MA, Cubitt served as Conservative Party Member of Parliament for West Surrey from 1860 to 1885, and then for Mid Surrey until 1892, when elevated to the Lords as Baron Ashcombe of Dorking, Surrey and of Bodiam Castle, Sussex, having been invested as a Privy Counsellor in 1880. He also served as Honorary Colonel of the 5th Battalion, Royal West Surrey Regiment, and Deputy Lieutenant of the counties of both Surrey and Middlesex.

With his wife, Laura Joyce, Cubitt fathered 9 children; 3 sons, though only the third, Henry , survived beyond infancy, and 6 daughters.