Dorothy Cavendish

Dorothy Cavendish may refer to:
 * Dorothy Bentinck, Duchess of Portland (née Cavendish, 1750–1794), wife of William Cavendish-Bentinck, 3rd Duke of Portland
 * Lady Dorothy Macmillan (née Cavendish, 1900–1966), daughter of Victor Cavendish, 9th Duke of Devonshire and wife of Harold Macmillan