UK public data, by local authority district
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The population stood at 190,037 in 2025. That is 0.2% 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 — Carmarthenshire

190,037, latest 2025 (-0.2% year on year, from 190,346).

The population stood at 190,037 in 2025. That is 0.2% lower than a year earlier. The series peaked at 190,346 in 2024; the latest figure is 0.2% below that peak. Its low point was 169,255 in 1993; the latest reading is 12% above that.

Show the numbers (35 periods)
Population estimate — Carmarthenshire, every published period
PeriodValue
2025190,037
2024190,346
2023190,255
2022189,142
2021188,172
2020187,391
2019186,125
2018185,444
2017184,984
2016184,985
2015184,404
2014184,349
2013184,252
2012184,206
2011183,961
2010183,004
2009182,846
2008182,517
2007181,314
2006179,504
2005178,229
2004177,487
2003176,133
2002174,628
2001173,652
2000172,874
1999172,329
1998172,039
1997171,534
1996171,145
1995171,060
1994169,962
1993169,255
1992169,265
1991169,725

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 — Carmarthenshire
190,037 for Carmarthenshire, 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/carmarthenshire/population-estimate

See every dataset published for Carmarthenshire

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