Duchess of Marlborough
Duchess of Marlborough may refer to:
- Sarah Churchill, Duchess of Marlborough (1660–1744), wife of John Churchill, 1st Duke of Marlborough
- Henrietta Godolphin, 2nd Duchess of Marlborough (1681–1733), daughter and heiress of the 1st Duke of Marlborough
- Elizabeth Spencer, Duchess of Marlborough (d. 1761), wife of Charles Spencer, 3rd Duke of Marlborough
- Caroline Spencer, Duchess of Marlborough (1742–1811), wife of George Spencer, 4th Duke of Marlborough
- Susan Spencer-Churchill, Duchess of Marlborough (1767–1841), wife of George Spencer-Churchill, 5th Duke of Marlborough
- Jane Spencer-Churchill, Duchess of Marlborough (1798–1844), first wife of George Spencer-Churchill, 6th Duke of Marlborough
- Charlotte Spencer-Churchill, Duchess of Marlborough (1818–1850), second wife of George Spencer-Churchill, 6th Duke of Marlborough
- Jane Spencer-Churchill, Duchess of Marlborough (1817–1897), third wife of George Spencer-Churchill, 6th Duke of Marlborough
- Frances Anne Spencer-Churchill, Duchess of Marlborough (15 April 1822 – 16 April 1899), wife of John Spencer-Churchill, 7th Duke of Marlborough
- Albertha Spencer-Churchill, Duchess of Marlborough (1847–1932), first wife of George Spencer-Churchill, 8th Duke of Marlborough
- Lily Spencer-Churchill, Duchess of Marlborough (1854–1909), second wife of George Spencer-Churchill, 8th Duke of Marlborough
- Consuelo Vanderbilt (1877–1964), first wife of Charles Spencer-Churchill, 9th Duke of Marlborough
- Gladys Spencer-Churchill, Duchess of Marlborough (d. 1977), second wife of Charles Spencer-Churchill, 9th Duke of Marlborough
- Alexandra Spencer-Churchill, Duchess of Marlborough (1900–1961), first wife of John Spencer-Churchill, 10th Duke of Marlborough
- Frances Spencer-Churchill, Duchess of Marlborough (1915–1990), second wife of John Spencer-Churchill, 10th Duke of Marlborough
- Rosita Spencer-Churchill, Duchess of Marlborough (b. 1943), third wife of John Spencer-Churchill, 11th Duke of Marlborough
- Lily Spencer-Churchill, Duchess of Marlborough (b. c. 1957), fourth wife of the 11th Duke