Marcus Richard Kimball, Baron Kimball (18 October 1928 – 26 March 2014) was a British Conservative politician.
The son of Major Lawrence Kimball, he was born in Marylebone, London and educated at Eton College and Trinity College, Cambridge. He became a farmer and a Lloyd's underwriter. He was a councillor on Rutland County Council and commanded a squadron of the Leicestershire Yeomanry.
Kimball contested Derby South in 1955. He was Member of Parliament for Gainsborough from a 1956 by-election until 1983. While representing this constituency, he wrote to Margaret Thatcher, after Argentina's invasion of the Falkland Islands, that he felt the British government should "let the Argentinians have the Falklands with as little fuss as possible." This letter, apparently written without the knowledge of his constituency party, remained secret until revealed by the release of part of the Thatcher archive in 2013.
According to his obituary he treated his constituents in much the same way as he treated the tenants of his Market Harborough and Altnaharra estates advising potential MPs not to promise to hold surgeries and not to live in the constituency unless sure there was a good local hunt. Kimball opposed separate taxation for women in 1978, saying women just gave the bill to their husbands.