Who is the MP for Chesham and Amersham?

Sarah Green (Liberal Democrat) is the MP for Chesham and Amersham. They were first elected in June 2021.

Who won Chesham and Amersham at the 2024 general election?

The 2024 general election in Chesham and Amersham was won by Liberal Democrats with 44.9% of the vote, ahead of Conservative on 34.8%.

Who is projected to win the next election in Chesham and Amersham?

PollCheck's current projection has Liberal Democrats on 40.0% and Conservative on 25.1% if a general election were held today. The projection updates as new polling is added.

What council is Chesham and Amersham in?

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

What is the demographic profile of Chesham and Amersham?

Chesham and Amersham is in South East. The seat is closely divided on Brexit (Leave vote estimated at 45.0% in 2016). Around 47.3% of residents have a degree, a median age of 45, and 74.7% of homes are owner-occupied (Census 2021).

When was the last general election in Chesham and Amersham?

The most recent general election was held on 4 July 2024. In Chesham and Amersham, Liberal Democrats won with 44.9% of the vote. The next general election must be held by August 2029.

Which parties have won Chesham and Amersham in recent elections?

Recent general election winners in Chesham and Amersham: 2010 Conservative, 2015 Conservative, 2017 Conservative, 2019 Conservative, 2024 Liberal Democrats.

Constituency profile

Chesham and Amersham

South East · County constituency · Buckinghamshire borough

Sitting MP

Sarah Green

Liberal Democrat

First elected June 2021

Current PollCheck projection

Region & type

South East

County constituency, Buckinghamshire council

Last 5 GE winners

CCCCLD

Conservative 4/5, Liberal Democrats 1/5

EU referendum 2016

45.0% Leave

UK average 51.9%; -6.9pp below mean

Current outlook

Liberal Democrats +14.9pp

vs Conservative 25.1%

SouthernRemain-leaningGraduate-heavy

Who lives in Chesham and Amersham? Constituency demographics

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

Leave vote 2016

45.0%

UK average ~52%

Degree or above

47.3%

UK average ~34%

No qualifications

11.8%

UK average ~18%

Owner-occupied

74.7%

UK average ~63%

Renting (social + private)

24.6%

UK average ~36%

Median age

44.7

UK median ~40

Age 65+

25.9%

UK average ~19%

Age 18-34

23.2%

UK average ~28%

How did Chesham and Amersham 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

LD gain from Con · majority 5,451 votes (10.1pp) · turnout 72.7%

Current projection

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

Map of Chesham and Amersham

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)

Chesham and Amersham within Buckinghamshire

The Westminster constituency of Chesham and Amersham sits entirely within Buckinghamshire 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
Buckinghamshire 59 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 Chesham and Amersham at each of the last 60 GB polls. Hover the chart for the underlying poll details.

Who has won Chesham and Amersham 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 hold	Cheryl Gillan	5.6%	60.4%	28.5%	4.1% UKIP	1.5%	-	16,710	74.6%
2015	Con hold	Cheryl Gillan	12.7%	59.1%	9.0%	13.7% UKIP	5.5%	-	23,920	72.7%
2017	Con hold	Cheryl Gillan	20.6%	60.7%	13.0%	2.8% UKIP	3.0%	-	22,140	77.1%
2019notional	Conservative winner	Cheryl Gillan 2019 MP, pre-review boundary	13.9%	56.3%	22.4%	-	4.8%	2.6%	18,216	72.4%
2024	LD gain from Con	Sarah Green	6.4%	34.8%	44.8%	9.8% Ref	3.1%	1.1%	5,451	72.7%

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

Constituencies most like Chesham and Amersham

Five seats with similar demographic profiles to Chesham and Amersham. 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.