Lord Henry George Charles Gordon-Lennox PC (2 November 1821 – 29 August 1886), known as Lord Henry Lennox, was a British Conservative politician who sat in the House of Commons from 1846 to 1885 and was a close friend of Benjamin Disraeli.
Lennox was the third son of Charles Gordon-Lennox, 5th Duke of Richmond, and Lady Caroline, daughter of Field Marshal Henry Paget, 1st Marquess of Anglesey. He was the brother of Charles Gordon-Lennox, 6th Duke of Richmond, Lord Alexander Gordon-Lennox and Lord George Gordon-Lennox. He was educated at The Prebendal School, Chichester, then University of Oxford.
Lennox entered the House of Commons in 1846 as Member of Parliament for Chichester, in Sussex. He represented this constituency until 1885, when he stood for Partick, but was defeated.
Lennox held office in every Conservative government between 1852 and 1876. He was a Junior Lord of the Treasury in 1852 and between 1858 and 1859 in the first two short-lived governments of the Earl of Derby before becoming First Secretary of the Admiralty in 1866 in Derby's last government, a post he held until 1868, the last year under the premiership of his close friend Benjamin Disraeli. According to John F. Beeler in British naval policy in the Gladstone-Disraeli era, 1866-1880, Lennox acted as a spy to the then Chancellor of the Exchequer, Disraeli, informing him of the intentions of leading admirals.
He served again under Disraeli as First Commissioner of Works from 1874 to 1876 and was admitted to the Privy Council in 1874. He was forced to resign as First Commissioner of Works after revelations in the case of Twycross v Grant regarding the Lisbon Tramways swindle, of which company he was a director.