List of parliamentary constituencies in South Yorkshire

The ceremonial county of South Yorkshire is divided into 14 parliamentary constituencies – 7 borough constituencies and 7 county constituencies.

Sheffield Hallam was the only non-Labour South Yorkshire seat for many years, and was held by Nick Clegg for 12 years, until Labour gained the seat in 2017. For a 22-year period spanning 1997–2019, the Conservatives had no seats in South Yorkshire, until the 2019 election, when they gained three. In the 1980s, the region's socialist activity (particularly in local government) led to it being referred to as the "People's Republic of South Yorkshire", it being dominated by Labour, a party with a strong socialist tradition. However, it was not until 2017 that every seat in South Yorkshire was won by Labour, a feat which was not repeated at the subsequent 2019 election. At the 2024 general election Labour regained all South Yorkshire constituencies.

2010 boundary changes
Under the Fifth Periodic Review of Westminster constituencies, the Boundary Commission for England decided to reduce the number of seats in South Yorkshire from 15 to 14, leading to significant changes. Barnsley East and Mexborough, Barnsley West and Penistone, Sheffield, Brightside, and Sheffield, Hillsborough were abolished and replaced by Barnsley East, Penistone and Stocksbridge, and Sheffield, Brightside and Hillsborough. Sheffield, Attercliffe was renamed Sheffield South East, and Wentworth was renamed Wentworth and Dearne.

Proposed boundary changes
See 2023 Periodic Review of Westminster constituencies for further details.

Following the abandonment of the Sixth Periodic Review (the 2018 review), the Boundary Commission for England formally launched the 2023 Review on 5 January 2021. Initial proposals were published on 8 June 2021 and, following two periods of public consultation, revised proposals were published on 8 November 2022. The final proposals were published on 28 June 2023.

The commission has proposed that South Yorkshire be combined with Humberside as a sub-region of the Yorkshire and the Humber Region, resulting in the creation of a new cross-county boundary constituency named Doncaster East and the Isle of Axholme, largely replacing Don Valley. Barnsley Central and Barnsley East would be realigned to form Barnsley North and Barnsley South. Changes to Wentworth and Dearne would result in it being renamed Rawmarsh and Conisbrough.

The following constituencies are proposed:

Containing electoral wards from Barnsley Containing electoral wards from Doncaster Containing electoral wards from Rotherham Containing electoral wards from Sheffield
 * Barnsley North
 * Barnsley South
 * Penistone and Stocksbridge (part)
 * Doncaster East and the Isle of Axholme (part also in North Lincolnshire)
 * Doncaster North
 * Doncaster Central
 * Rawmarsh and Conisbrough (part)
 * Rawmarsh and Conisbrough (part)
 * Rother Valley
 * Rotherham
 * Penistone and Stocksbridge (part)
 * Sheffield Brightside and Hillsborough
 * Sheffield Central
 * Sheffield Hallam
 * Sheffield Heeley
 * Sheffield South East

Results history
Primary data source: House of Commons research briefing - General election results from 1918 to 2019

2019
The number of votes cast for each political party who fielded candidates in constituencies comprising South Yorkshire in the 2019 general election were as follows:

Percentage votes
11983 & 1987 - SDP-Liberal Alliance

* Included in Other

Seats
11983 & 1987 - SDP-Liberal Alliance

Historical representation by party
A cell marked → (with a different colour background to the preceding cell) indicates that the previous MP continued to sit under a new party name.

2010 to present
1also includes some areas of Humberside