UK public data, by local authority district
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The population stood at 121,748 in 2025. That is 1.1% lower 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 — Welwyn Hatfield

121,748, latest 2025 (-1.1% year on year, from 123,051).

The population stood at 121,748 in 2025. That is 1.1% lower than a year earlier. The series peaked at 123,051 in 2024; the latest figure is 1.1% below that peak. Its low point was 93,812 in 1991; the latest reading is 30% above that.

Show the numbers (35 periods)
Population estimate — Welwyn Hatfield, every published period
PeriodValue
2025121,748
2024123,051
2023122,047
2022120,571
2021119,747
2020119,806
2019119,180
2018118,365
2017117,617
2016116,637
2015113,972
2014112,166
2013111,990
2012110,684
2011110,727
2010109,630
2009108,434
2008107,442
2007106,694
2006105,096
2005103,202
2004100,470
200399,198
200298,136
200197,550
200097,253
199996,838
199895,763
199795,432
199695,579
199595,010
199494,187
199394,495
199294,123
199193,812

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 — Welwyn Hatfield
121,748 for Welwyn Hatfield, 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/welwyn-hatfield/population-estimate

See every dataset published for Welwyn Hatfield

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