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South Antrim

Constituency

North east Northern Ireland. About 107,805 people (mid-2024 estimate) in 795 square kilometres.

MP for South Antrim

Robin SwannUlster Unionist PartyMP since

They won by 7,512 votes on a 55.7% 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 3% of people in South Antrim live in a 1 km square that the radon atlas marks as a radon Affected Area.

Majority, 2024 general election
17.5%
Joint 255th largest majority of 650
House of Commons Library · Jul 2024
Turnout, 2024 general election
55.7%
Joint 180th lowest turnout of 650
House of Commons Library · Jul 2024
Population
106,441
202nd most populated of 650
ONS Census 2021 · 2021
People in radon Affected Area squares
3%
UK 44%
Worked out by Open Index

2024 general election result

Candidates in South Antrim at the general election on 4 July 2024, in finishing order
CandidatePartyVotesShare
Robin SwannElectedUlster Unionist Party16,31138.0%
Paul GirvanDemocratic Unionist Party8,79920.5%
Declan KearneySinn Féin8,03418.7%
John BlairAlliance4,57410.7%
Mel LucasTraditional Unionist Voice2,6936.3%
Roisin LynchSocial Democratic & Labour Party1,5893.7%
Lesley VeronicaGreen Party Northern Ireland5411.3%
Siobhan McErleanAontú3670.9%
Electorate
77,058
Turnout
55.7%
Majority
7,512 (17.5%)
Valid votes
42,908
Rejected ballots
181

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 Antrim compares

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

South AntrimMiddle
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 Antrim is 17.5%.
17.5%joint 255th 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%. South Antrim is 55.7%.
55.7%joint 180th lowest turnout
Population650 constituencies, UK · 2021
Population: every constituency in UK650 areas from 26,159 to 151,876. The middle area is 100,988. South Antrim is 106,441.
106,441202nd most 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 Antrim is 3.0%.
3%joint 139th fewest people in radon Affected Areas

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

What is the population of South Antrim?

South Antrim had 106,441 usual residents at the census.

South Antrim is the 202nd most populated of 650 in the UK.

Figures for the whole of Antrim and Newtownabbey

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

Average house price
£206,120
Up 8.8% in a year
HM Land Registry · Jul 2026
Population estimate
148,487
Up 0.3% in a year
ONS population estimates · 2025
Female life expectancy
82.5years
UK 83.0 years
ONS life expectancy · 2022 to 2024
Gigabit broadband coverage
97.1%
UK 87.8%
Ofcom · Jan 2026
South Antrim in brief

The winner in South Antrim had a majority of 17.5% of valid votes at the general election on 4 July 2024.

Turnout in South Antrim at the general election on 4 July 2024 was 55.7%.

South Antrim had 106,441 usual residents at the census.

About 3% of people in South Antrim live in a 1 km square that the radon atlas marks as a radon Affected Area.