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{{refimprove|date=June 2025}}
The '''Duchess of Portland''' refers to the wife or widow of a [[Duke of Portland]], a former title in the peerage of Great Britain. The title was created in 1716 but became extinct in 1990 upon the death of the ninth Duke.

==Duchesses of Portland==
* Elizabeth Bentinck, Duchess of Portland (née Lady Elizabeth Noel) (1688–1737), wife of [[Henry Bentinck, 1st Duke of Portland]]
* [[Margaret Bentinck, Duchess of Portland]] (née Lady Margaret Harley) (1715&ndash;1785), British aristocrat, wife of [[William Bentinck, 2nd Duke of Portland]]<ref>{{cite news |last1=Whitworth |first1=Damian |title=Her amazing grace |work=The Times |issue=68646 |date=13 March 2006 |page=97 |quote=The story of Margaret, second Duchess of Portland, provides a tantalising glimpse of what might have been... So when Margaret, known as Peggy, married the Second Duke of Portland....|issn=0140-0460}}</ref>
* [[Dorothy Bentinck, Duchess of Portland]] (née Lady Dorothy Cavendish) (1750&ndash;1794), wife of [[William Cavendish-Bentinck, 3rd Duke of Portland]]
* [[Henrietta Bentinck, Duchess of Portland]] (née Henrietta Scott) (1774&ndash;1844), wife of [[William Bentinck, 4th Duke of Portland]]
* [[Winifred Cavendish-Bentinck, Duchess of Portland]] (née Winifred Dallas-Yorke) (1863&ndash;1954), British humanitarian and animal rights activist, wife of [[William Cavendish-Bentinck, 6th Duke of Portland]]
* [[Ivy Cavendish-Bentinck, Duchess of Portland]] (née Ivy Gordon-Lennox) (1887&ndash;1982), founder of the Harley Gallery and Foundation, wife of [[William Cavendish-Bentinck, 7th Duke of Portland]]<ref>{{cite news |title=Ivy, Duchess of Portland DBE |work=The Times |issue=61175 |date=6 March 1982 |page=8 |quote=Widow of the seventh Duke of Portland, died on March 3rd. She was 94.|issn=0140-0460}}</ref>
* Gwyneth Ethel Cavendish-Bentinck, Duchess of Portland (née Gwyneth Ethel Edwards) (1907–1986), wife of [[Ferdinand Cavendish-Bentinck, 8th Duke of Portland]]
* Kathleen Elsie Cavendish-Bentinck, Duchess of Portland (née Kathleen Elsie Barry) (1911–2004), wife of [[Victor Cavendish-Bentinck, 9th Duke of Portland]]

== References ==
{{Reflist}}

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[[Category:British duchesses by marriage|#]]