1997–2010 • The District of North Hertfordshire wards of Arbury, Baldock, Grange, Letchworth East, Letchworth South East, Letchworth South West, Newsells, Royston East, Royston West, Sandon, Weston, and Wilbury; and • The District of East Hertfordshire wards of Braughing, Buntingford, Cottered, Little Hadham, Munden, Standon St Mary, Stapleford, Tewin, Thundridge, and Watton-at-Stone.
2010–2024 • The District of North Hertfordshire wards of Arbury, Baldock East, Baldock Town, Ermine, Letchworth East, Letchworth Grange, Letchworth South East, Letchworth South West, Letchworth Wilbury, Royston Heath, Royston Meridian, Royston Palace, and Weston and Sandon; and • The District of East Hertfordshire wards of Braughing, Buntingford, Hertford Rural North, Hertford Rural South, Little Hadham, Mundens and Cottered, Puckeridge, Thundridge and Standon, Walkern, and Watton-at-Stone.
Minor changes due to revision of local authority wards. 2024–present The
2023 review of Westminster constituencies, which was based on the ward structures in place on 1 December 2020, left the boundaries virtually unchanged. However, following local government boundary reviews in East Hertfordshire and North Hertfordshire which came into effect in May 2023 and May 2024 respectively, the constituency now comprises the following from the
2024 general election: • The District of East Hertfordshire wards or part wards of: Aston, Datchworth & Walkern (
Bennington and Walkern parishes); Braughing & Standon; Buntingford; Hertford Rural; Little Hadham & The Pelhams; The Mundens; Ware Rural (
Thundridge parish); Watton-at-Stone. • The District of North Hertfordshire wards of: Arbury; Baldock East; Baldock West; Ermine; Letchworth Grange; Letchworth Norton; Letchworth South East; Letchworth South West; Letchworth Wilbury; Royston Heath, Royston Meridian, Royston Palace; Weston & Sandon. == Members of Parliament ==