Lady Cynthia Mary Evelyn Asquith (née Charteris; 27 September 1887 – 31 March 1960) was an English writer and socialite, known for her ghost stories and diaries.

Lady Cynthia was born at Clouds House, East Knoyle, Wiltshire on 27 September 1887,[2] one of seven children of Hugo Richard Charteris, 11th Earl of Wemyss (1857–1937), and Mary Constance Wyndham, of The Souls fame.

Asquith became known for editing The Ghost Book, an anthology of supernatural fiction, including work by D. H. Lawrence, Algernon Blackwood, Arthur Machen, Oliver Onions, and May Sinclair.

[11] One of Asquith's stories, "The Follower", was adapted for BBC Radio, along with others by Algernon Blackwood, Marjorie Bowen, and Noel Streatfeild; all were later reprinted in the Cecil Madden anthology My Grimmest Nightmare (1935).

[6] "'God Grante That She Lye Stille'", first published in When Churchyards Yawn, was adapted in 1961 by Robert Hardy Andrews as an episode of the anthology TV series Thriller.