1997–2010 • The
District of Forest Heath; and • The
Borough of St Edmundsbury wards of Barningham, Barrow, Cangle, Castle, Chalkstone, Chevington, Clements, Honington, Horringer, Hundon, Ixworth, Kedington, Risby, St Mary's and Helions, Stanton, Wickhambrook, and Withersfield.
The new county constituency was formed primarily from the majority (including Newmarket) of the constituency of Bury St Edmunds, which was reconfigured. It was extended southwards, incorporating westernmost areas of South Suffolk, including Haverhill. 2010–2024 • The District of Forest Heath; and • The Borough of St Edmundsbury wards of Bardwell, Barningham, Barrow, Chedburgh, Haverhill East, Haverhill North, Haverhill South, Haverhill West, Hundon, Ixworth, Kedington, Risby, Stanton, Wickhambrook, and Withersfield.
Marginal changes due to revision of local authority wards. With effect from 1 April 2019, the District of Forest Heath and the Borough of St Edmundsbury were abolished and absorbed into the
District of West Suffolk.
Current boundaries Further to the
2023 Periodic Review of Westminster constituencies, which came into effect for the
2024 general election, the composition of the constituency is as follows (as they existed on 1 December 2020): • The District of West Suffolk wards of: Barrow; Brandon Central; Brandon East; Brandon West; Chedburgh & Chevington; Clare, Hundon & Kedington; Exning; Haverhill Central; Haverhill East; Haverhill North; Haverhill South; Haverhill South East; Haverhill West; Horringer; Iceni; Kentford & Moulton; Lakenheath; Manor; Mildenhall Great Heath; Mildenhall Kingsway & Market; Mildenhall Queensway; Newmarket East; Newmarket North; Newmarket West; Risby; The Rows; Whepstead & Wickhambrook; Withersfield.
The four wards (Bardwell, Barningham, Ixworth and Stanton) in the north east corner of the seat were moved to the newly named constituency of Bury St Edmunds and Stowmarket, partly offset by small transfers in from Bury St Edmunds and South Suffolk. The constituency includes the town of
Newmarket, a global centre of
horse racing, as well as the towns of
Haverhill and
Mildenhall, with a farmed landscape, interspersed with patches of forest and small villages. == Members of Parliament ==