Who is the MP for Llanelli?

Dame Nia Griffith (Labour) is the MP for Llanelli. They were first elected in May 2005.

Who won Llanelli at the 2024 general election?

The 2024 general election in Llanelli was won by Labour with 31.3% of the vote, ahead of Reform UK on 27.6%.

Who is projected to win the next election in Llanelli?

PollCheck's current projection has Reform UK on 35.8% and Plaid Cymru on 32.7% if a general election were held today. The projection updates as new polling is added.

What council is Llanelli in?

Llanelli sits within Carmarthenshire council. Westminster constituencies and local councils are separate units, but Carmarthenshire covers most or all of the Llanelli area.

What is the demographic profile of Llanelli?

Llanelli is in Wales. The seat is Leave-voting (Leave vote estimated at 56.7% in 2016). Around 29.2% of residents have a degree, a median age of 45, and 69.1% of homes are owner-occupied (Census 2021).

When was the last general election in Llanelli?

The most recent general election was held on 4 July 2024. In Llanelli, Labour won with 31.3% of the vote. The next general election must be held by August 2029.

Which parties have won Llanelli in recent elections?

Recent general election winners in Llanelli: 2010 Labour, 2015 Labour, 2017 Labour, 2019 Labour, 2024 Labour.

Constituency profile

Llanelli

Wales · County constituency · Carmarthenshire borough

Sitting MP

Dame Nia Griffith

Labour

First elected May 2005

Current PollCheck projection

Region & type

Wales

County constituency, Carmarthenshire council

Last 5 GE winners

LLLLL

Labour 5/5

EU referendum 2016

56.7% Leave

UK average 51.9%; +4.8pp above mean

Current outlook

Reform UK +3.1pp

Vulnerability score 10/10 (Labour projected to lose)

WelshLeave-leaning

Who lives in Llanelli? Constituency demographics

From the 2021 Census and 2016 EU referendum estimates. Constituency-level data on 2024 boundaries.

Leave vote 2016

56.7%

UK average ~52%

Degree or above

29.2%

UK average ~34%

No qualifications

20.7%

UK average ~18%

Owner-occupied

69.1%

UK average ~63%

Renting (social + private)

30.5%

UK average ~36%

Median age

44.7

UK median ~40

Age 65+

27.1%

UK average ~19%

Age 18-34

26.5%

UK average ~28%

How did Llanelli vote in 2024 and how would it vote now?

2024 vote shares from the HoC Library. Current projection is at the 7-poll average.

2024 general election

Lab hold · majority 1,504 votes (3.7pp) · turnout 57.0%

Current projection

If a general election were held today, at current poll average

Map of Llanelli

Switch between ward-level 2024 election winners and a demographic view. Ward winners are Britain Elects' / New Statesman modelled estimates with an average ~4pp margin of error per ward. The demographic view splits the seat into small neighbourhoods (around 1,500 residents each, from the 2021 Census). Hover any area for detail.

Senedd 2026 layer

How Llanelli voted at the Senedd election (7 May 2026)

Llanelli sits entirely within the Senedd constituency of Sir Gaerfyrddin. Senedd elections use a closed-list proportional system; each Senedd seat returns six members.

Senedd constituency	Share of Llanelli	Winner	Runner-up	Seats (6 per constituency)
Sir Gaerfyrddin	100%	Plaid Cymru 43.1%	Reform UK 32.8%	3 Plaid Cymru, 3 Reform UK

Senedd 2026 results from official declarations. Overlap percentages are area-based using the post-2024 Westminster boundary against the new 16-seat Senedd boundary.

Council layer (not Westminster)

Llanelli within Carmarthenshire

The Westminster constituency of Llanelli sits entirely within Carmarthenshire Council. Local council elections are a separate ballot from Westminster general elections - the figures below are from the council elections held on Thursday 7 May 2026.

Council overlap

Council	Share of seat
Carmarthenshire 54 LSOAs	100%

Most recent council ward results

Latest council winner per ward. Where May 2026 elections happened, those are shown; otherwise the most recent year on the ward’s pre-2026 boundary (via DCLEAPIL, 2014-2024). The "Shift since GE2024" column is only computed for May 2026 results - earlier council votes pre-date the GE, so no directional shift is shown.

Loading ward results...

Ward	GE2024 winner	Latest council winner	Shift since GE2024	Turnout

Projection trajectory

PollCheck's projection for Llanelli at each of the last 60 GB polls. Hover the chart for the underlying poll details.

Who has won Llanelli at past general elections?

2024 result is on current boundaries. The 2019 row is the UK Parliament's notional recalculation onto the 2024 boundaries (directly comparable to 2024). The 2010, 2015 and 2017 rows are on the boundaries in force at the time and aren't directly comparable.

Year	Result	MP	Lab	Con	LD	Right (Ref/UKIP)	Green	Other	Majority	Turnout
2010	Lab hold	Nia Griffith	42.5%	14.4%	10.4%	2.8% UKIP	-	-	4,701	67.3%
2015	Lab hold	Nia Griffith	41.3%	14.3%	1.9%	16.3% UKIP	1.8%	1.4%	7,095	65.0%
2017	Lab hold	Nia Griffith	53.5%	23.7%	1.4%	3.3% UKIP	-	-	12,024	67.9%
2019notional	Labour winner	Nia Griffith 2019 MP, pre-review boundary	39.3%	30.7%	0.0%	-	-	30.0%	3,793	62.8%
2024	Lab hold	Nia Griffith	31.3%	10.5%	3.1%	27.6% Ref	2.7%	1.5%	1,504	57.0%

Earlier years are on pre-2024 boundaries; comparable results on the new boundary will be added when sourced.

Constituencies most like Llanelli

Five seats with similar demographic profiles to Llanelli. Politics shown for context.

What would change this seat?

Move the sliders to set national vote shares. The per-seat projection updates live. Reset returns to the current 7-poll average.

Sources

2024 general election results · UK Parliament Election Results portal and House of Commons Library briefing CBP-10009.
Notional 2019 results on 2024 boundaries · UK Parliament Election Results portal. Recalculated by Parliament; carries assumptions about how 2019 voters would have distributed across the redrawn boundaries.
Historic general election results (2010-2017) · House of Commons Library historic results files (on the boundaries in force at the time).
Ward-level GE2024 estimates · Britain Elects / New Statesman - article by Ben Walker, underlying spreadsheet. Modelled from constituency totals; average ~4pp per-ward MoE.
May 2026 council ward results · Democracy Club via PollCheck's locals 2026 dataset.
Earlier council ward results (2014-2024) · DCLEAPIL v1.0 (Jason Leman, drawing on Andrew Teale's LEAP dataset and Democracy Club).
Demographics · ONS Census 2021 (England and Wales), aggregated to constituency level using the ONS LSOA21 -> PCON24 best-fit lookup.
EU referendum 2016 estimates · Constituency-level Leave vote estimates (Hanretty 2017 method).
MP details and Cabinet roles · UK Parliament Members API. MP photos are fetched live from the same source.
Boundary geometry and lookups · ONS Open Geography Portal (PCON24 boundaries, LSOA21 boundaries, LSOA21-WD24-LAD24 best-fit lookup).
Current projection and trajectory · PollCheck's demographic swingometer applied to the rolling 7-poll average from aggregated GB polls. Not a true MRP - vote-share movements are applied through per-constituency sensitivity multipliers derived from demographic regressions.

If you spot a data issue, please let us know.