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Welsh-speaking dependent children by council, Census 2021

Usual residents of each of Wales's 22 councils by Welsh-speaking dependent children, Census 2021, from the ONS Census API (its “Welsh speaking ability of dependent children (9 categories)”).

Dependent child can speak Welsh: Aged 3 to 4 years, highest: Gwynedd

1,591

Census Day, 21 March 2021

Verified against source, 31 October 2026, 11:16 UTC
Welsh-speaking dependent children by council, Census 2021
05001k2k2kGwynedd1,591Carmarthenshire1,478Cardiff1,074Rhondda Cynon Taf820Isle of Anglesey756Ceredigion597Swansea525Caerphilly500Conwy478Denbighshire465Vale of Glamorgan449Pembrokeshire432Powys425Neath Port Talbot415Wrexham344Flintshire342Newport283Bridgend280Torfaen202Monmouthshire196Merthyr Tydfil114Blaenau Gwent86

Source: Office for National Statistics (Census 2021). Contains public sector information licensed under the Open Government Licence v3.0.

Data table

22 rows

AreaDoes not applyDependent child can speak Welsh: Aged 3 to 4 yearsDependent child can speak Welsh: Aged 5 to 11 yearsDependent child can speak Welsh: Aged 12 to 15 yearsDependent child can speak Welsh: Aged 16 to 18 yearsDependent child cannot speak Welsh: Aged 3 to 4 yearsDependent child cannot speak Welsh: Aged 5 to 11 yearsDependent child cannot speak Welsh: Aged 12 to 15 yearsDependent child cannot speak Welsh: Aged 16 to 18 years
Gwynedd W0600000298,5761,5917,7054,5772,4786441,020523280
Carmarthenshire W06000010156,3391,4788,3125,0572,7052,3546,1073,4432,102
Cardiff W06000015299,3721,0748,1535,0762,4226,84321,67011,1456,553
Rhondda Cynon Taf W06000016195,3498204,9873,3671,8634,33514,6137,7314,587
Isle of Anglesey W0600000157,3687564,0672,2951,3256501,333693391
Ceredigion W0600000861,5405973,4781,9911,1455441,200578402
Swansea W06000011198,8725254,4563,0231,4164,25513,7937,4904,661
Caerphilly W06000018144,4245003,8772,6801,3503,41110,6775,5983,436
Conwy W0600000396,8534783,4262,3291,3081,5854,8312,4641,468
Denbighshire W0600000479,5484652,7011,7609171,5094,7592,6101,546
Vale of Glamorgan W06000014108,4634492,9902,0649842,5237,9504,1202,396
Pembrokeshire W06000009103,0034323,1751,9209281,9776,2993,5432,082
Powys W06000023112,9074253,1452,0811,0642,0225,9933,4172,115
Neath Port Talbot W06000012118,0894152,8191,7808752,6298,3984,6622,622
Wrexham W06000006111,1133442,9721,9088912,5938,2494,4402,607
Flintshire W06000005128,2463423,1022,2601,1172,8589,1184,9892,932
Newport W06000022129,3542833,2182,3761,0623,68211,1045,2833,228
Bridgend W06000013120,3532802,2051,5378382,8389,5494,9842,900
Torfaen W0600002076,0302021,9801,4225951,8645,6062,9151,661
Monmouthshire W0600002178,3931962,0161,5007401,4784,5092,4741,650
Merthyr Tydfil W0600002448,3251141,0516343501,2123,9502,0901,112
Blaenau Gwent W0600001955,884869387293751,3304,2652,1331,164

Download CSVDownload JSON with full provenance

Map

Dependent child can speak Welsh: Aged 3 to 4 years · 22 areas, each shaded by the fifth of the areas its figure falls in

  • 86 to 280
  • 280 to 425
  • 425 to 478
  • 478 to 820
  • 820 to 1,591

Boundaries: Council boundaries, May 2026, from the geography spine. Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Source and licence

Publisher
Office for National Statistics (Census 2021)
Check it yourself
https://www.ons.gov.uk/datasets/create
Licence
Open Government Licence v3.0 – Contains public sector information licensed under the Open Government Licence v3.0.
Retrieved
31 October 2026, 11:12 UTC
Raw files fetched

Verification

Verified against source, 31 October 2026, 11:16 UTC Run at 31 October 2026, 11:16 UTC; 198 of 198 figures matched the live source.

ResultCheckDetail
PassProvenance recordedOffice for National Statistics (Census 2021); Open Government Licence v3.0; retrieved 2026-10-31T11:12:20Z; 2 raw file(s)
PassRaw files match recorded SHA-2562 of 2 files intact
PassRe-parsing raw files reproduces figures198 of 198 figures and the headline reproduced
PassFigures are finite numbers198 figures, 0 invalid
PassLive source matches every figure198 of 198 figures match exactly after downloading 2 source file(s) again (2 byte-identical); the headline matches
PassThe ONS's answer for England and for Wales agreesin 9 of 9 cells (a category in a nation) the councils sum to the nation's count at https://api.beta.ons.gov.uk/v1/population-types/UR/census-observations?area-type=ctry&dimensions=welsh_speaking_dependent_child within twice the square root of the councils summed (3 exactly; the largest gap 0.21 of its limit), the Census's cell-by-cell perturbation
PassSource page answershttps://www.ons.gov.uk/datasets/create – HTTP 200

Notes

  • Census Day was the 21st of March 2021. The ONS perturbs every count slightly to protect privacy, each cell on its own, so a council's categories can add up to a total a few people different from one topic to another, and its councils add up to England's and Wales's counts only within a few dozen.
  • By council as the ONS's Census API gives them, its lower-tier local authorities of 2023, with Barnsley's and Sheffield's figures under the codes they had until the 1st of April 2025, as the API gives them. Scotland's and Northern Ireland's censuses are separate, so their councils are not here.
  • Every council's categories together count all its usual residents, “Does not apply” those the question was not asked of.
  • The question was asked in Wales only: the API puts all of England's usual residents under “Does not apply”, so only Wales's 22 councils are here.
  • The ONS's description of the topic, “Welsh speaking ability of dependent children (9 categories)”: Identifies if a dependent child aged 3 years and over living in a family, speaks Welsh and categorises them by age group.