The English ceremonial county of Wiltshire, which includes the Borough of Swindon, is divided into eight Parliamentary constituencies: one borough constituency and seven county constituencies, including one which spans the county boundary with Gloucestershire.
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 general election, the Boundary Commission for England opted to combine Wiltshire with Gloucestershire as a sub-region of the South West Region, with the creation of the cross-county boundary constituency of South Cotswolds, resulting in a major reconfiguration of Chippenham. Devizes and North Wiltshire were abolished and new constituencies, named East Wiltshire, and Melksham and Devizes, created.
The following seats were proposed:
Containing electoral wards in the Borough of Swindon
Containing electoral wards in the Wiltshire unitary authority district
Under the fifth periodic review of Westminster constituencies, the Boundary Commission for England decided to increase the number of seats in Wiltshire from 6 to 7, with the re-establishment of Chippenham, which affected neighbouring constituencies. An adjusted Westbury constituency was renamed South West Wiltshire.
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 Wiltshire in the 2024 general election were as follows:
The number of votes cast for each political party who fielded candidates in constituencies comprising Wiltshire in the 2019 general election were as follows:
<sup>1</sup>pre-1979 â Liberal Party; 1983 & 1987 â SDPâÂÂLiberal Alliance
<nowiki>*</nowiki> Included in Other
<sup>1</sup>1974 & 1979 â Liberal Party; 1983 & 1987 â SDPâÂÂLiberal Alliance
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.
From 2024, part of northern Wiltshire was included in the South Cotswolds constituency, slightly more than half of which lies in Gloucestershire. Its representation is covered at List of parliamentary constituencies in Gloucestershire.