UK public data, by local authority district
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The population stood at 135,698 in 2025. That is 0.4% 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 — Test Valley

135,698, latest 2025 (+0.4% year on year, from 135,169).

The population stood at 135,698 in 2025. That is 0.4% higher than a year earlier. That is the highest value in the published series, which begins in 1991. Its low point was 101,288 in 1991; the latest reading is 34% above that.

Show the numbers (35 periods)
Population estimate — Test Valley, every published period
PeriodValue
2025135,698
2024135,169
2023134,368
2022132,879
2021131,158
2020128,858
2019127,652
2018126,474
2017125,250
2016124,155
2015122,256
2014120,478
2013119,068
2012117,462
2011116,698
2010115,814
2009115,251
2008115,101
2007114,433
2006113,530
2005112,811
2004112,049
2003111,271
2002110,387
2001109,965
2000109,341
1999108,711
1998108,310
1997106,589
1996104,586
1995103,645
1994103,490
1993103,475
1992102,231
1991101,288

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 — Test Valley
135,698 for Test Valley, 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/test-valley/population-estimate

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