Charles Gordon-Lennox, 5th Duke of Richmond, KG, PC (né Lennox; 3 August 1791 – 21 October 1860), styled the Earl of March from 1806–19, was a Scottish peer, soldier and prominent Conservative politician.

[4] As Earl of March, he served on Wellington's staff in the Peninsular War,[2] during which time he volunteered to join the 52nd (Oxfordshire) Regiment of Foot's advance storming party on the fortress of Ciudad Rodrigo.

[2] The latter year he succeeded his father in the dukedom and entered the House of Lords where he was a vehement opponent of Roman Catholic emancipation, and later was a leader of the opposition to Peel's free trade policy, as he was the president of the Central Agricultural Protection Society, which campaigned for the preservation of the Corn Laws.

Although a vigorous Conservative and Ultra-Tory for most of his career, Richmond's anger with Wellington over Catholic Emancipation prompted him to lead the Ultras into joining Earl Grey's reforming Whig government in 1830 (Lang, 1999).

[4][12] On 10 April 1817 he married Lady Caroline Paget (1797 – March 1874), a daughter of Henry Paget, 1st Marquess of Anglesey by his wife Lady Caroline Villiers, by whom he had five sons and five daughters: The Duke died at Portland Place, Marylebone, London, in October 1860, aged 69 and was succeeded in the dukedom by his eldest son Charles Gordon-Lennox, 6th Duke of Richmond (1818–1903).