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Caerphilly

Constituency

South east Wales. About 96,966 people (mid-2024 estimate) in 141 square kilometres.

MP for Caerphilly

Chris EvansLabour (Co-op)MP since

They won by 6,419 votes on a 52.6% turnout.

As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

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Radon Affected Area by constituency

Worked out by Open Index · 2022

Under 1%90% or more

About 83% of people in Caerphilly live in a 1 km square that the radon atlas marks as a radon Affected Area.

Majority, 2024 general election
16.8%
Joint 261st largest majority of 650
House of Commons Library · Jul 2024
Turnout, 2024 general election
52.6%
Joint 107th lowest turnout of 650
House of Commons Library · Jul 2024
Population
96,381
185th least populated of 650
ONS Census 2021 · 2021
People in radon Affected Area squares
83%
UK 44%
Worked out by Open Index

2024 general election result

Candidates in Caerphilly at the general election on 4 July 2024, in finishing order
CandidatePartyVotesShare
Chris EvansElectedLabour and Co-operative Party14,53838.0%
Lindsay WhittlePlaid Cymru8,11921.2%
Joshua KimReform UK7,75420.3%
Brandon GormanConservative4,38511.5%
Steve AichelerLiberal Democrat1,7884.7%
Mark ThomasGreen Party1,6504.3%
Electorate
72,648
Turnout
52.6%
Majority
6,419 (16.8%)
Valid votes
38,234
Rejected ballots
156

Polling day . Shares are of valid votes; turnout is valid votes as a share of the electorate. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: House of Commons Library, UK Parliament election results. The result from the House of Commons Library

How Caerphilly compares

Each dot is a constituency. The black line marks the middle one.

CaerphillyMiddle
Majority, 2024 general election650 constituencies, UK · Jul 2024
Majority, 2024 general election: every constituency in UK650 areas from 0.0% to 60.6%. The middle area is 14.1%. Caerphilly is 16.8%.
16.8%joint 261st largest majority
Turnout, 2024 general election650 constituencies, UK · Jul 2024
Turnout, 2024 general election: every constituency in UK650 areas from 40.0% to 75.2%. The middle area is 60.0%. Caerphilly is 52.6%.
52.6%joint 107th lowest turnout
Population650 constituencies, UK · 2021
Population: every constituency in UK650 areas from 26,159 to 151,876. The middle area is 100,988. Caerphilly is 96,381.
96,381185th least populated
People in radon Affected Area squares650 constituencies, UK · 2022
People in radon Affected Area squares: every constituency in UK650 areas from 0.0% to 100.0%. The middle area is 39.0%. Caerphilly is 83.0%.
83%joint 149th most people in radon Affected Areas

Every constituency ranked: population and people in radon affected area squares.

What is the population of Caerphilly?

Caerphilly had 96,381 usual residents at the census.

Caerphilly is the 185th least populated of 650 in the UK.

Figures for the whole of Caerphilly

Most of Caerphilly lies in Caerphilly. These figures are published for the whole of Caerphilly, not for constituencies, so they describe the council and not Caerphilly itself. See Caerphilly

Average house price
£198,545
Up 4.4% in a year
HM Land Registry · Aug 2026
Median full-time pay
£35,367
78th lowest paid of 348
ONS earnings survey · 2025
House price to pay
5.6×
Joint 66th most affordable of 348
Worked out by Open Index
Population estimate
176,078
Down 0.1% in a year
ONS population estimates · 2025
Caerphilly in brief

The winner in Caerphilly had a majority of 16.8% of valid votes at the general election on 4 July 2024.

Turnout in Caerphilly at the general election on 4 July 2024 was 52.6%.

Caerphilly had 96,381 usual residents at the census.

About 83% of people in Caerphilly live in a 1 km square that the radon atlas marks as a radon Affected Area.