Sleaford and North Hykeham
East Midlands · County constituency · North Kesteven borough
About the Sleaford and North Hykeham constituency
Sleaford and North Hykeham is a county constituency in the East Midlands, covering most or all of North Kesteven. The sitting MP is Dr Caroline Johnson (Conservative), first elected in December 2016.
At the 2024 general election, the Conservatives won Sleaford and North Hykeham with 35.7% of the vote, ahead of Labour on 26.8%, a majority of 4,346 votes. Turnout was 64.2%.
If a general election were held today, PollCheck's projection at the current seven-poll average has Reform UK on 36.5% and the Conservatives on 25.8% in Sleaford and North Hykeham, a margin of 10.7 points, a projected change from the Conservatives since 2024. The projection updates automatically as new polls are added.
Demographically, Sleaford and North Hykeham is a strongly Leave-voting area (an estimated 61.6% voted Leave in 2016). About 29.8% of residents hold a degree, 73.0% of homes are owner-occupied, and the seat has a median age of about 46 (2021 Census).
Across the most recent general elections on record here, the seat has been won by the Conservatives each time.
Who lives in Sleaford and North Hykeham? Constituency demographics
From the 2021 Census and 2016 EU referendum estimates. Constituency-level data on 2024 boundaries.
How did Sleaford and North Hykeham 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
Current projection
Map of Sleaford and North Hykeham
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.
Sleaford and North Hykeham within North Kesteven
The Westminster constituency of Sleaford and North Hykeham sits entirely within North Kesteven Council. Local council elections are a separate ballot from Westminster general elections - English councils rotate their election cycles and North Kesteven was not due to vote in 2026, so the figures below show the most recent council ward results available.
Council overlap
| Council | Share of seat |
|---|---|
| North Kesteven | 100% |
Recent council by-elections
Council ward by-elections held inside this seat, most recent first. The result column shows which party won; the share column shows the top three parties’ vote shares on the day.
| Date | Ward | Result | Top 3 vote shares |
|---|---|---|---|
| 12 Mar 2026 | Sleaford Westholme | Ref GAIN from Con | Ref 45% Other 27% Con 15% |
| 14 Dec 2023 | Billinghay Rural | LD GAIN from Con | LD 41% Con 30% Other 30% |
Most recent council ward results
Latest council winner per ward. Where the council held a May 2026 election, those results are shown; otherwise we show the most recent available ward result (via DCLEAPIL, 2014-2024), or, where the seat was uncontested at the last election, the current sitting councillor from OpenCouncilData. 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.
| Ward | GE2024 winner | Latest council winner | Shift since GE2024 | Turnout |
|---|
Projection trajectory
PollCheck's projection for Sleaford and North Hykeham at each of the last 60 GB polls. Hover the chart for the underlying poll details.
Who has won Sleaford and North Hykeham 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 | Majority | Turnout |
|---|---|---|---|---|---|---|---|
| 2010 | Con hold | Stephen Phillips | 16.9% | 51.6% | 18.2% | 19,905 | 70.2% |
| 2015 | Con hold | Stephen Phillips | 17.3% | 56.2% | 5.7% | 24,115 | 70.4%+0.2 |
| 2017 | Con hold | Caroline Johnson | 25.8% | 64.2% | 4.1% | 25,237 | 72.4%+2.0 |
| 2019notional | Conservative winner | Caroline Johnson 2019 MP, pre-review boundary | 18.6% | 66.5% | 8.2% | 24,680 | 70.2%-2.2 |
| 2024 | Con hold | Caroline Johnson | 26.8% | 35.7% | 4.7% | 4,346 | 64.2%-6.0 |
Earlier years are on pre-2024 boundaries; comparable results on the new boundary will be added when sourced.
Constituencies most like Sleaford and North Hykeham
Five seats with similar demographic profiles to Sleaford and North Hykeham. Politics shown for context.
- ↑Owner-occupied73.0 / 74.6vs 61.9
- ↑Leave61.6 / 61.7vs 53.2
- ↓Social rent10.1 / 8.8vs 16.8
- ↑Owner-occupied73.0 / 73.6vs 61.9
- ↑Leave61.6 / 60.8vs 53.2
- ↓Social rent10.1 / 10.6vs 16.8
- ↑Owner-occupied73.0 / 74.1vs 61.9
- ↑Leave61.6 / 60.2vs 53.2
- ↓Social rent10.1 / 11.7vs 16.8
- ↑Owner-occupied73.0 / 72.7vs 61.9
- ↓Social rent10.1 / 10.8vs 16.8
- ↑Age 65+27.7 / 27.2vs 22.7
- ↑Owner-occupied73.0 / 72.4vs 61.9
- ↑Leave61.6 / 59.5vs 53.2
- ↓Under 3525.3 / 25.1vs 30.2
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.
Related
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.
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