Lady Charlotte Mary Bacon, née Harley (12 December 1801 - 9 May 1880), was the second daughter of Edward Harley, 5th Earl of Oxford and Earl Mortimer. Her beauty as a child prompted Lord Byron to dedicate the first two cantos of Childe Harold's Pilgrimage to her, under the name "Ianthe". Lord Byron had been one of the many lovers of her mother, Jane Elizabeth Scott. Lady Charlotte was also the subject of the painting Lady Charlotte Harley as Hebe by Richard Westall.
She married Captain Anthony Bacon in 1823. She stayed with relatives in South Australia between 1869 and 1874, and Charlotte Waters, Northern Territory was named in her honour by R. R. Knuckey and G. R. McMinn in 1871. Her son Harley Bacon had contributed food supplies to Charles Todd's survey team.