UK public data, by local authority district
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The population stood at 272,612 in 2025. That is 0.6% 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 — Harrow

272,612, latest 2025 (+0.6% year on year, from 270,987).

The population stood at 272,612 in 2025. That is 0.6% higher than a year earlier. That is the highest value in the published series, which begins in 1991. Its low point was 203,013 in 1991; the latest reading is 34% above that.

Show the numbers (35 periods)
Population estimate — Harrow, every published period
PeriodValue
2025272,612
2024270,987
2023267,893
2022263,123
2021261,159
2020262,281
2019262,065
2018259,861
2017257,881
2016257,317
2015255,308
2014251,618
2013247,018
2012243,800
2011240,499
2010237,451
2009233,495
2008229,567
2007226,355
2006223,632
2005221,109
2004216,267
2003213,728
2002212,336
2001210,044
2000209,114
1999207,909
1998206,662
1997206,933
1996207,186
1995206,968
1994207,373
1993206,284
1992203,710
1991203,013

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 — Harrow
272,612 for Harrow, 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/harrow/population-estimate

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