Mary Caroline Moorman (born 19 February 1905, died 21 January 1994) was a British historian and biographer. She was born Mary Caroline Trevelyan, the daughter of the renowned Cambridge historian GM Trevelyan. She studied at Somerville College, Oxford. In 1930, she published William III and the Defence of Holland, 1672-44. That same year, she married John Moorman, an Anglican cleric who rose to become the Bishop of Ripon.

She is best known today for her two-volume biography of the poet William Wordsworth. The first volume came out in 1957, followed by a second volume in 1966. The latter won the James Tait Black Memorial Prize for biography. She was also closely involved with the Wordsworth Trust, serving first as secretary and then as chair of the trust. She died in 1994.^[1]