UK public data, by local authority district
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The population stood at 287,583 in 2025. That is 0.8% higher than a year earlier.

Why the caveats matter

Every figure carries the publisher's own caveats. Where a statistic is published for a wider area than the one you clicked, or where the publisher itself flags it as unreliable, the page says so rather than quietly rounding it off.

The UK's four nations publish separately, so some figures stop at a border: house sale prices cover England and Wales, road collisions Great Britain. Pupil absence is published for England, but not every English district individually — some are reported only as part of their wider county. An area with fewer datasets isn't missing data — either its nation publishes that statistic through a different body, or (pupil absence only) its own district isn't reported separately.

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Population estimate — Sefton

287,583, latest 2025 (+0.8% year on year, from 285,298).

The population stood at 287,583 in 2025. That is 0.8% higher than a year earlier. The series peaked at 292,935 in 1991; the latest figure is 1.8% below that peak. Its low point was 273,814 in 2013; the latest reading is 5% above that.

Show the numbers (35 periods)
Population estimate — Sefton, every published period
PeriodValue
2025287,583
2024285,298
2023283,078
2022280,956
2021279,693
2020278,621
2019278,908
2018277,890
2017276,962
2016276,707
2015275,546
2014275,143
2013273,814
2012273,979
2011273,969
2010273,820
2009274,153
2008274,735
2007275,085
2006275,852
2005276,957
2004278,853
2003279,913
2002280,866
2001282,884
2000283,337
1999284,162
1998285,159
1997286,457
1996287,491
1995288,953
1994290,466
1993292,199
1992292,815
1991292,935

What these terms mean

Mid-year estimate
A modelled count of the population on 30 June, updated between censuses. It is an estimate, not a headcount. Source
Local authority district
The council area a statistic is published for -- 361 across the UK. In England these are boroughs, districts and unitary authorities; in Scotland, council areas; in Wales, principal areas; in Northern Ireland, districts.

Before you use these figures

  • Mid-year estimate, not a census count: This is a modelled mid-year (30 June) estimate, not a direct headcount. It is rebased periodically against the latest UK census results -- the current series was rebased to the 2021/2022 censuses, replacing previously published estimates for 2011 to 2022. Figures for the same year can therefore change between publications as later data becomes available.
  • Unrounded, but not precise to the individual: Figures are published unrounded to enable further calculation, but ONS is explicit that small estimates should not be read as accurate to a specific person -- they are produced using statistical models and disclosure-control methods, not a direct count.

Cite this figure:

Population estimate — Sefton
287,583 for Sefton, 2025
Caveats: Mid-year estimate, not a census count; Unrounded, but not precise to the individual
StatsMapped last confirmed this figure unchanged on 5 Sep 2026.
Source: Office for National Statistics, Population Estimates (via Nomis)
https://statsmapped.com/united-kingdom/local-authority/sefton/population-estimate

See every dataset published for Sefton

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