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South West Hertfordshire

Constituency

The south west of the East of England. About 101,223 people (mid-2024 estimate) in 97 square kilometres.

MP for South West Hertfordshire

Mr Gagan MohindraConservativeMP since

They won by 4,456 votes on a 67.3% 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.

Open in map

Radon Affected Area by constituency

Worked out by Open Index · 2022

Under 1%90% or more

About 76% of people in South West Hertfordshire live in a 1 km square that the radon atlas marks as a radon Affected Area.

Majority, 2024 general election
9.2%
Joint 198th smallest majority of 650
House of Commons Library · Jul 2024
Turnout, 2024 general election
67.3%
Joint 94th highest turnout of 650
House of Commons Library · Jul 2024
Population
99,064
264th least populated of 650
ONS Census 2021 · 2021
People in radon Affected Area squares
76%
UK 44%
Worked out by Open Index

2024 general election result

Candidates in South West Hertfordshire at the general election on 4 July 2024, in finishing order
CandidatePartyVotesShare
Gagan MohindraElectedConservative16,45834.1%
Sally SymingtonLiberal Democrat12,00224.9%
Alex SufitLabour9,63720.0%
Keith SteersReform UK6,79014.1%
Narinder SianGreen Party2,5325.2%
Bernadette O'MalleyParty of Women2950.6%
Victor SilkinRejoin EU2320.5%
Michael McGetrickSocial Democratic Party1580.3%
Ketankumar PipaliyaUK Voice1500.3%
Electorate
71,737
Turnout
67.3%
Majority
4,456 (9.2%)
Valid votes
48,254
Rejected ballots
145

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 South West Hertfordshire compares

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

South West HertfordshireMiddle
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%. South West Hertfordshire is 9.2%.
9.2%joint 198th smallest 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%. South West Hertfordshire is 67.3%.
67.3%joint 94th highest turnout
Population650 constituencies, UK · 2021
Population: every constituency in UK650 areas from 26,159 to 151,876. The middle area is 100,988. South West Hertfordshire is 99,064.
99,064264th 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%. South West Hertfordshire is 76.0%.
76%joint 179th most people in radon Affected Areas

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

What is the population of South West Hertfordshire?

South West Hertfordshire had 99,064 usual residents at the census.

South West Hertfordshire is the 264th least populated of 650 in the UK.

Figures for the whole of Three Rivers

Most of South West Hertfordshire lies in Three Rivers. These figures are published for the whole of Three Rivers, not for constituencies, so they describe the council and not South West Hertfordshire itself. See Three Rivers

Average house price
£590,232
Up 0.9% in a year
HM Land Registry · Aug 2026
Median full-time pay
£43,980
64th highest paid of 348
ONS earnings survey · 2025
House price to pay
13.4×
10th least affordable of 348
Worked out by Open Index
Deprivation score
10.0
Joint 23rd least deprived of 296
MHCLG · England only
South West Hertfordshire in brief

The winner in South West Hertfordshire had a majority of 9.2% of valid votes at the general election on 4 July 2024.

Turnout in South West Hertfordshire at the general election on 4 July 2024 was 67.3%.

South West Hertfordshire had 99,064 usual residents at the census.

About 76% of people in South West Hertfordshire live in a 1 km square that the radon atlas marks as a radon Affected Area.