| Charles Marsham, 3rd Earl of Romney | |
| Office1: | Member of Parliament for Kent West |
| Term1: | 1841-1845 |
| Party: | Conservative |
| Birth Date: | 30 July 1808 |
| Father: | Charles Marsham |
| Mother: | Sophia Pitt |
| Relatives: | Charles Marsham (grandfather) Frances Wyndham (grandmother) William Morton Pitt (grandfather) |
| Children: | 4, including Charles and John |
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 the son of Charles Marsham, 2nd Earl of Romney, and Sophia, daughter of William Morton Pitt.
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. He was succeeded in the earldom by his eldest son, Charles.