Leonora Sansay (December 11, 1773 – 1821) was an American novelist. She was the author of Secret History; or, The Horrors of St. Domingo, in a Series of Letters Written by a Lady at Cape Francois to Col. Burr, late Vice-President of the United States, Principally During the Command of General Rochambeau (Philadelphia, 1808) and Laura (Philadelphia, 1809), and possibly three other novels: Zelica: The Creole (London, 1820); The Scarlet Handkerchief (London, 1823); and The Stranger in Mexico (not extant).