# St Clears and Llansteffan South west Carmarthenshire. About 5,440 people (mid-2024 estimate) in 89 square kilometres. St Clears and Llansteffan had 5,188 usual residents at the census (ONS Census 2021). Ward. Code W05001221. In: [Wales](https://openindex.co.uk/wales) › [Carmarthenshire](https://openindex.co.uk/carmarthenshire) ## Key figures - **Population: 5,188** (2021). St Clears and Llansteffan had 5,188 usual residents at the census (ONS Census 2021). Joint 2,905th least populated of 8,397. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/carmarthenshire/ward/st-clears-and-llansteffan#f-population - **People in radon Affected Area squares: 100%** (2022). About 100% of people in St Clears and Llansteffan live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. https://openindex.co.uk/carmarthenshire/ward/st-clears-and-llansteffan#f-radon-affected-share - **Gigabit broadband coverage: 42.2%** (January 2026). In St Clears and Llansteffan, 42.2% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/carmarthenshire/ward/st-clears-and-llansteffan#f-gigabit-coverage - **Claimant rate: 2.2%** (August 2026). In St Clears and Llansteffan, 2.2% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026 (ONS via Nomis). UK 3.9%. Source: Claimant count (Nomis), August 2026. Published 15 September 2026. https://openindex.co.uk/carmarthenshire/ward/st-clears-and-llansteffan#f-claimant-rate ## On the map - [Radon Affected Area by ward](https://openindex.co.uk/map/radon-affected-areas?place=W05001221) (Worked out by Open Index · 2022): About 100% of people in St Clears and Llansteffan live in a 1 km square that the radon atlas marks as a radon Affected Area. - [Average house price by council](https://openindex.co.uk/map/house-prices?place=W05001221) (UK House Price Index · August 2026): Published for whole councils, so the map colours all of Carmarthenshire. The outline is St Clears and Llansteffan. - [Crime and ASB by ward](https://openindex.co.uk/map/recorded-crime?place=W05001221) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for St Clears and Llansteffan. - [Population by ward](https://openindex.co.uk/map/population?place=W05001221) (Census 2021, England and Wales): St Clears and Llansteffan had 5,188 usual residents at the census. ## How St Clears and Llansteffan compares Each ward against every other ward the measure covers. | Measure | St Clears and Llansteffan | Rank | Compared with | | --- | --- | --- | --- | | Population | 5,188 | 12th most populated | 51 wards, Carmarthenshire · 2021 | | People in radon Affected Area squares | 100% | joint most people in radon Affected Areas | 51 wards, Carmarthenshire · 2022 | | Gigabit broadband coverage | 42.2% | 12th lowest | 51 wards, Carmarthenshire · Jan 2026 | | Claimant rate | 2.2% | joint 12th lowest | 51 wards, Carmarthenshire · Aug 2026 | ## Is St Clears and Llansteffan safe? What police records show In the 12 months to August 2026, police recorded crimes and anti-social behaviour in St Clears and Llansteffan at a rate of 52.9 per 1,000 people. That compares with 86.7 per 1,000 people across Carmarthenshire. Across Wales as a whole, the recorded crime rate was 96.7 per 1,000 people. In August 2026 alone, 20 cases of crime and anti-social behaviour were recorded in St Clears and Llansteffan. In the 12 months to August 2026, the most common types were violence and sexual offences (156), other crime (54) and anti-social behaviour (29). Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates. Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest. ## Figures for the whole of Carmarthenshire These figures are published for the whole of Carmarthenshire, not for each ward, so they describe all of Carmarthenshire and not St Clears and Llansteffan alone. [See Carmarthenshire](https://openindex.co.uk/carmarthenshire) - **Average house price: £195,263** (August 2026). Carmarthenshire’s average house price was £195,263 in August 2026 (HM Land Registry). Up 2.7% in a year. Source: UK House Price Index, August 2026. Published 21 October 2026. - **Median full-time pay: £37,405** (2025). Full-time workers living in Carmarthenshire earned a median of £37,405 in 2025 (ONS earnings survey). 138th lowest paid of 348. Source: Annual Survey of Hours and Earnings, 2025. Published 23 October 2025. - **House price to pay: 5.2×** (2025). A home in Carmarthenshire costs 5.2 times local full-time pay. Joint 53rd most affordable of 348. Source: Worked out by Open Index from the UK House Price Index and the ONS earnings survey. Published 21 October 2026. - **Population estimate: 190,037** (2025). Carmarthenshire’s population was an estimated 190,037 in mid-2025 (ONS population estimates). Down 0.2% in a year. Source: Mid-year population estimates, 2025. Published 1 October 2026. ## St Clears and Llansteffan in brief St Clears and Llansteffan had 5,188 usual residents at the census. About 100% of people in St Clears and Llansteffan live in a 1 km square that the radon atlas marks as a radon Affected Area. In St Clears and Llansteffan, 42.2% of homes and businesses could get gigabit-capable broadband in January 2026. In St Clears and Llansteffan, 2.2% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026. ## About - Type: Ward - Code: W05001221 - Constituency: [Caerfyrddin †](https://openindex.co.uk/constituency/caerfyrddin) - Council: [Carmarthenshire](https://openindex.co.uk/carmarthenshire) - Nation: [Wales](https://openindex.co.uk/wales) - Area: 89.47 km² - People, mid-2024: 5,440* - Neighbourhoods: 3 - Output areas: 17 * People: worked out by Open Index from neighbourhood estimates, shared out by where people lived at the census (by area in Northern Ireland). This area's edges do not follow neighbourhood edges, so the figure is close but not exact. † Best fit: the constituency this ward mostly lies in. Its edges do not follow it. ## Next door [Trelech](https://openindex.co.uk/carmarthenshire/ward/trelech), [Llanboidy](https://openindex.co.uk/carmarthenshire/ward/llanboidy), [Carmarthen Town North and South](https://openindex.co.uk/carmarthenshire/ward/carmarthen-town-north-and-south), [Laugharne Township](https://openindex.co.uk/carmarthenshire/ward/laugharne-township) ## Latest updates for St Clears and Llansteffan - August 2026 house prices published: HM Land Registry and partners · Oct 2026. - September 2026 rent published: ONS private rents · Oct 2026. - Dental practices updated: NHS England · Oct 2026. - Schools updated: Ofsted · Oct 2026. The same figures as JSON: https://openindex.co.uk/v1/places/W05001221 ## How to cite Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/carmarthenshire/ward/st-clears-and-llansteffan, or to one figure with its anchor, https://openindex.co.uk/carmarthenshire/ward/st-clears-and-llansteffan#f-population. Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it. Snapshot 2026.10.9. The HTML page: https://openindex.co.uk/carmarthenshire/ward/st-clears-and-llansteffan