UK public data, by local authority district
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The population stood at 137,365 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 — North Hertfordshire

137,365, latest 2025 (+0.4% year on year, from 136,818).

The population stood at 137,365 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 112,355 in 1991; the latest reading is 22% above that.

Show the numbers (35 periods)
Population estimate — North Hertfordshire, every published period
PeriodValue
2025137,365
2024136,818
2023135,580
2022134,189
2021133,583
2020133,054
2019133,195
2018133,283
2017133,629
2016133,103
2015131,662
2014131,062
2013129,460
2012128,542
2011127,494
2010126,286
2009125,269
2008124,391
2007122,974
2006121,890
2005120,757
2004120,092
2003119,148
2002117,959
2001117,051
2000115,983
1999115,284
1998115,085
1997114,226
1996113,608
1995113,757
1994113,277
1993112,767
1992112,942
1991112,355

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 — North Hertfordshire
137,365 for North Hertfordshire, 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/north-hertfordshire/population-estimate

See every dataset published for North Hertfordshire

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