UK public data, by local authority district
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The population stood at 163,566 in 2025. That is 1.5% higher than a year earlier. That is the highest value in the published series, which begins in 1991.

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 — Mid Sussex

163,566, latest 2025 (+1.5% year on year, from 161,122).

The population stood at 163,566 in 2025. That is 1.5% higher than a year earlier. That is the highest value in the published series, which begins in 1991. Its low point was 123,965 in 1991; the latest reading is 32% above that.

Show the numbers (35 periods)
Population estimate — Mid Sussex, every published period
PeriodValue
2025163,566
2024161,122
2023158,226
2022155,021
2021152,919
2020150,877
2019150,027
2018148,966
2017147,679
2016147,001
2015145,684
2014144,577
2013142,951
2012141,243
2011140,188
2010138,897
2009137,209
2008135,734
2007133,976
2006132,061
2005130,503
2004129,461
2003128,623
2002127,713
2001127,397
2000126,947
1999127,205
1998127,114
1997125,356
1996125,196
1995125,888
1994124,881
1993124,700
1992124,749
1991123,965

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 — Mid Sussex
163,566 for Mid Sussex, 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/mid-sussex/population-estimate

See every dataset published for Mid Sussex

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