Duchess of Marlborough is a title held by the wives of the Dukes of Marlborough and may refer to:
Sarah Churchill, Duchess of Marlborough (née Jenyns, 1660–1744), wife of the 1st Duke Henrietta Godolphin, 2nd Duchess of Marlborough (1681–1733), suo jure Duchess, daughter of the 1st Duke Elizabeth Spencer, Duchess of Marlborough (née Trevor, died 1761), wife of the 3rd Duke Caroline Spencer, Duchess of Marlborough (née Russell, 1742–1811), wife of the 4th Duke Susan Spencer-Churchill, Duchess of Marlborough (née Stewart, 1767–1841), wife of the 5th Duke Jane Spencer-Churchill, Duchess of Marlborough (1798–1844) (née Stewart), first wife of the 6th Duke The Hon. Charlotte Augusta Flower (1818–1850), second wife of the 6th Duke Jane Francis Clinton Stewart (1817–1897), third wife of the 6th Duke Frances Spencer-Churchill, Duchess of Marlborough (née Vane, 1822–1899), wife of the 7th Duke Albertha Spencer-Churchill, Duchess of Marlborough (née Hamilton, 1847–1932), first wife of the 8th Duke Lily Spencer-Churchill, Duchess of Marlborough (née Price, 1854–1909), second wife of the 8th Duke Consuelo Vanderbilt (1877–1964), first wife of the 9th Duke Gladys Spencer-Churchill, Duchess of Marlborough (née Deacon, 1881–1977), second wife of the 9th Duke Mary Spencer-Churchill, Duchess of Marlborough (née Cadogan, 1900–1961), first wife of the 10th Duke Laura Spencer-Churchill, Duchess of Marlborough (née Charteris, 1915–1990), second wife of the 10th Duke Rosita Spencer-Churchill, Duchess of Marlborough (née Douglas, born 1943), third wife of the 11th Duke Lily Mahtani (born 1957), fourth wife of the 11th Duke Rebecca Mary Few Brown (born 1957), first wife of the 12th Duke Edla Griffiths(born 1968), second wife of the 12th Duke
Other uses Duchess of Marlborough (Fabergé egg)