Charles Marsham, 3rd Earl of Romney (30 July 1808 – 3 September 1874), styled Viscount Marsham between 1811 and 1845, was a British peer and Conservative Party politician.
Romney was returned to Parliament as one of two representatives for Kent West in 1841, a seat he held until 1845 when he succeeded his father in the earldom and took his seat in the House of Lords.
Lord Romney married Lady Margaret Harriett Montagu-Scott, youngest daughter of Charles Montagu-Scott, 4th Duke of Buccleuch, on 7 February 1832.
They had three sons and one daughter: Lady Romney died in London in June 1846, aged 34.
Lord Romney remained a widower until his death in September 1874, aged 66.