Rosemary Clare Duffield (born 1 July 1971) is British Labour Party politician. She has been the Member of Parliament (MP) for Canterbury since the general election in June 2017.
Duffield was elected to parliament in 2017 defeating Sir Julian Brazier with a majority of 187. She is the first non-Conservative Member of Parliament to represent Canterbury since its reformulation as a single-member constituency in 1885 (as the MP serving from 1910 until 1918, Francis Bennett-Goldney, was an Independent Unionist) and became the first Labour MP to represent the constituency. At the time of the 2017 General Election, Canterbury had been the longest-held constituency of the seventy-one taken, five years longer-held than Mansfield which swang to the Conservative candidate.