The county of Northamptonshire is divided into 7 parliamentary constituencies: 2 borough constituencies and 5 county constituencies.
See 2023 review of Westminster constituencies for further details.
For the 2023 review of Westminster constituencies, which redrew the constituency map ahead of the 2024 United Kingdom general election, the Boundary Commission for England maintained seven constituencies in Northamptonshire, as detailed below, with boundary changes to reflect changes to ward boundaries following the reorganisation of local government authorities within the county and to bring the electorates within the statutory range. Corby was renamed Corby and East Northamptonshire, and Wellingborough renamed Wellingborough and Rushden. These changes came into effect from the 2024 general election.
Containing electoral wards from North Northamptonshire
Containing electoral wards from West Northamptonshire
Primary data source: House of Commons research briefing â General election results from 1918 to 2019
The number of votes cast for each political party who fielded candidates in constituencies comprising Northamptonshire in the 2024 general election were as follows:
<sup>1</sup>1974 & 1979 â Liberal Party; 1983 & 1987 â SDPâÂÂLiberal Alliance
<nowiki>*</nowiki> Included in Other
The borders of Northamptonshire changed from 1974, with the Soke of Peterborough area becoming part of neighbouring Cambridgeshire.
A cell marked â (with a different colour background to the preceding cell) indicates that the previous MP continued to sit under a new party name.