The Duchess of Portland | |
|---|---|
_by_George_Romney.jpg) Dorothy Bentinck, Duchess of Portland by George Romney | |
| Tenure | 8 November 1766 – 3 June 1794 |
| Born | 27 August 1750 |
| Died | 3 June 1794 (aged 43) London, England |
| Buried | St Marylebone Parish Church |
| Spouse(s) | |
| Issue | |
| Father | William Cavendish, 4th Duke of Devonshire |
| Mother | Charlotte Boyle, 6th Baroness Clifford |
Dorothy Bentinck, Duchess of Portland (née Lady Dorothy Cavendish; 27 August 1750 – 3 June 1794) was Duchess of Portland and the wife of William Cavendish-Bentinck, 3rd Duke of Portland, the Prime Minister of Great Britain.