Who is the MP for Portsmouth North?

Amanda Martin (Labour) is the MP for Portsmouth North. They were first elected in July 2024.

Who won Portsmouth North at the 2024 general election?

The 2024 general election in Portsmouth North was won by Labour with 34.9% of the vote, ahead of Conservative on 33.0%.

Who is projected to win the next election in Portsmouth North?

PollCheck's current projection has Reform UK on 39.2% and Conservative on 22.4% if a general election were held today. The projection updates as new polling is added.

What council is Portsmouth North in?

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

What is the demographic profile of Portsmouth North?

Portsmouth North is in South East. The seat is Leave-voting (Leave vote estimated at 63.7% in 2016). Around 26.5% of residents have a degree, a median age of 39, and 63.8% of homes are owner-occupied (Census 2021).

When was the last general election in Portsmouth North?

The most recent general election was held on 4 July 2024. In Portsmouth North, Labour won with 34.9% of the vote. The next general election must be held by August 2029.

Which parties have won Portsmouth North in recent elections?

Recent general election winners in Portsmouth North: 2010 Conservative, 2015 Conservative, 2017 Conservative, 2019 Conservative, 2024 Labour.

Constituency profile

Portsmouth North

South East · Borough constituency · Portsmouth borough

Sitting MP

Amanda Martin

Labour

First elected July 2024

Current PollCheck projection

Region & type

South East

Borough constituency, Portsmouth council

Last 5 GE winners

CCCCL

Conservative 4/5, Labour 1/5

EU referendum 2016

63.7% Leave

UK average 51.9%; +11.8pp above mean

Current outlook

Reform UK +16.8pp

Vulnerability score 10/10 (Labour projected to lose)

SouthernStrong Leave areaWorking-class profile

Who lives in Portsmouth North? Constituency demographics

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

Leave vote 2016

63.7%

UK average ~52%

Degree or above

26.5%

UK average ~34%

No qualifications

19.7%

UK average ~18%

Owner-occupied

63.8%

UK average ~63%

Renting (social + private)

35.2%

UK average ~36%

Median age

39.3

UK median ~40

Age 65+

20.6%

UK average ~19%

Age 18-34

30.9%

UK average ~28%

How did Portsmouth North 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 gain from Con · majority 780 votes (1.9pp) · turnout 59.0%

Current projection

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

Map of Portsmouth North

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.

Council layer (not Westminster)

Portsmouth North within Portsmouth

The Westminster constituency of Portsmouth North sits entirely within Portsmouth 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	Projection
Portsmouth 63 LSOAs	100%	View projection ›

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 Portsmouth North at each of the last 60 GB polls. Hover the chart for the underlying poll details.

Who has won Portsmouth North 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	Con gain from Lab	Penny Mordaunt	27.8%	44.3%	20.1%	4.1% UKIP	1.0%	2.7%	7,289	62.7%
2015	Con hold	Penny Mordaunt	23.8%	47.0%	6.2%	19.1% UKIP	3.2%	0.7%	10,537	62.1%
2017	Con hold	Penny Mordaunt	33.7%	54.8%	5.5%	4.1% UKIP	1.7%	0.3%	9,965	66.1%
2019notional	Conservative winner	Penny Mordaunt 2019 MP, pre-review boundary	27.0%	61.4%	7.4%	-	2.8%	1.4%	15,780	63.9%
2024	Lab gain from Con	Amanda Martin	34.8%	33.0%	7.3%	20.4% Ref	4.5%	-	780	59.0%

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

Constituencies most like Portsmouth North

Five seats with similar demographic profiles to Portsmouth North. 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.