Lon Y Llyn is in Caerphilly and in Rhymney Valley district. CF83 1BY is located in the St Martins electoral ward, within the English Parliamentary constituency of Caerphilly. This postcode has been in use since 1995-07-01.
StreetScan combines information about Lon Y Llyn, Caerphilly, CF83 1BY and displays a report on the quality of life in this place and its surroundings.
Nearby postcodes are: CF83 1DF, CF83 1DN, CF83 1DL, CF83 1DG, CF83 1DE, CF83 1DD, CF83 1EH, CF83 1DJ, CF83 1EN.
In the UK, the overall gender distribution is approximately 49% male and 51% female. However, the area surrounding CF83 1BY, has a female population slightly higher than UK average, with 53.9% of residents being female. Several factors can contribute to this. Women generally live longer than men, resulting in a higher proportion of women in neighborhoods with significant elderly populations. Typically, as people grow older, they tend to relocate from city center addresses to suburban areas, smaller towns, and rural locations. Consequently, these areas often have a higher number of females. A higher female population can also be found in areas with industries that employ more women, such as healthcare, education, and retail.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Female | 50.2% | 53.9% | 3.7% | 51.0% | 2.9% |
| Male | 49.8% | 46.1% | -3.7% | 49.0% | -2.9% |
Across the UK, the average relationship status breakdown is roughly 44% married, 38% single, 9% divorced, 6% widowed, and 2% separated.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Single | 27.6% | 33.7% | 6.1% | 37.9% | -4.2% |
| Married: Opposite sex | 55.9% | 49.4% | -6.5% | 44.2% | 5.2% |
| Separated | 0.4% | 0% | -0.4% | 2.2% | -2.2% |
| Divorced | 9.8% | 7.5% | -2.3% | 9.1% | -1.6% |
| Widowed | 6.3% | 9.4% | 3.1% | 6.1% | 3.3% |
Across the UK, the average 48.4% rated their health as Very Good, 33.6% as Good, 12.7% as Fair, 4% as Bad, and 1.2% as Very Bad.
Population age significantly impacts residents' health. Additionally, socioeconomic status plays a crucial role: higher income levels and lower poverty rates are linked to better health outcomes. Affluent areas benefit from higher living standards, access to private healthcare, and healthier lifestyle choices.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Very good health | 43.9% | 38.8% | -5.1% | 48.4% | -9.6% |
| Good health | 32% | 35.6% | 3.6% | 33.6% | 2.0% |
| Fair health | 13.2% | 17.9% | 4.7% | 12.7% | 5.2% |
| Bad health | 6.9% | 5.8% | -1.1% | 4.0% | 1.8% |
| Very bad health | 4% | 1.9% | -2.1% | 1.2% | 0.7% |
During the 2021 census, the educational qualifications of residents across the UK were as follows: 18.2% had no qualifications, 9.6% had 1-4 GCSEs, 13.4% had 5 or more GCSEs and 1-2 A/AS Levels, 16.9% had 2 or more A Levels, 33.8% held a degree (or equivalent), and 5.4% had completed an apprenticeship.
This area stands out for its low percentage of residents with higher education degree. The UK average is 33.8%, while in this area it is 21.8%.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| No qualifications | 26.4% | 20.7% | -5.7% | 18.2% | 2.5% |
| 1-4 GCSEs or Equivalent | 10.6% | 11.1% | 0.5% | 9.6% | 1.5% |
| 5 or more GCSEs, an A-Level or 1-2 AS Levels | 19.7% | 15.1% | -4.6% | 13.4% | 1.7% |
| Apprenticeship | 9.4% | 7.7% | -1.7% | 5.3% | 2.4% |
| HNC, HND or 2+ A Levels | 14.6% | 21% | 6.4% | 16.9% | 4.1% |
| Degree or Similar | 16.9% | 21.8% | 4.9% | 33.8% | -12.0% |
| Other | 2.4% | 2.6% | 0.2% | 2.8% | -0.2% |
In this area, the population is predominantly white, with 98.1% identifying as such, significantly higher than the UK average of 81.4%. This indicates a lower level of ethnic diversity compared to the broader UK population.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Chinese | 1% | 0% | -1.0% | 0.7% | -0.7% |
| Indian | 0.3% | 0% | -0.3% | 3.1% | -3.1% |
| Black Caribbean | 0% | 0.3% | 0.3% | 1.0% | -0.7% |
| Mixed White and Asian | 0.3% | 0.3% | 0.0% | 0.8% | -0.5% |
| Mixed White and Caribbean | 0.3% | 0.6% | 0.3% | 0.9% | -0.3% |
| Mixed Other | 0% | 0.6% | 0.6% | 0.8% | -0.2% |
| White | 98% | 98.1% | 0.1% | 81.4% | 16.7% |
In this area, 95.8% of the population were born in the United Kingdom, which is higher than the UK average of 83.2%.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| United Kingdom | 98% | 95.8% | -2.2% | 83.2% | 12.6% |
| European Union | 0.7% | 1.6% | 0.9% | 6.1% | -4.5% |
| Rest of Europe | 0% | 0.3% | 0.3% | 0.8% | -0.5% |
| Middle East and Asia | 1% | 0.6% | -0.4% | 5.6% | -5.0% |
| The Americas and the Caribbean | 0.3% | 1% | 0.7% | 1.3% | -0.3% |
| Oceania | 0% | 0.6% | 0.6% | 0.3% | 0.3% |
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Born in the UK | 97.4% | 95.5% | -1.9% | 83.2% | 12.3% |
| 10+ Years | 0% | 3.5% | 3.5% | 9.8% | -6.3% |
| 5-10 Years | 0% | 0.6% | 0.6% | 2.9% | -2.3% |
| 2-5 Years | 0.3% | 0.3% | 0.0% | 2.2% | -1.9% |
| Less than 2 years | 2.3% | 0% | -2.3% | 1.9% | -1.9% |
| 2021 | UK Average | postcode vs UK (pp) | |
|---|---|---|---|
| United Kingdom | 86.1% | 76.7% | 9.4% |
| Poland | 1.6% | 1.3% | 0.3% |
| Other EU countries | 0.3% | 1.5% | -1.2% |
| North America and the Caribbean | 0.3% | 0.3% | 0.0% |
| No passport held | 11.7% | 13.5% | -1.8% |
| 2021 | UK Average | postcode vs UK (pp) | |
|---|---|---|---|
| No religion | 47.1% | 37.2% | 9.9% |
| Christian | 48.4% | 46.2% | 2.2% |
| Buddhist | 0.3% | 0.5% | -0.2% |
| Muslim | 0.3% | 6.5% | -6.2% |
| Not answered | 3.9% | 6.0% | -2.1% |
Over the last 12 months, the overall crime rate around Lon Y Llyn was 65.8 per 1,000 residents, which is 41.3% lower than the Morgan Jones average. The most reported crime type was Violence and sexual offences.
Lon Y Llyn has the 46th lowest crime rate of 91 local areas in Morgan Jones and the 260th lowest crime rate of 569 local areas in Caerphilly .
Violent and sexual offences accounted for around 29.6 crimes per 1,000 residents and have been falling year on year. Over the last decade, overall crime has risen by about 15.3%.

Households in this area have a similar level of wealth to the average household in England and Wales. 51% of analyzed areas in England and Wales have higher average household annual income than this area.

| Address | Sale Price | Sale Date | Price Estimate 2025 |
|---|---|---|---|
| 2 Lon Y Llyn, Caerphilly, Caerphilly Semi-Detached, an established residential building | £246,250 | 2021-12-22 | £295,223 |
| 6 Lon Y Llyn, Caerphilly, Caerphilly Semi-Detached, an established residential building | £177,000 | 2021-05-18 | £229,476 |
| 18 Lon Y Llyn, Caerphilly, Caerphilly Semi-Detached, an established residential building | £192,000 | 2021-05-07 | £248,923 |
| Rosary Cottage Lon Y Llyn, Caerphilly, Caerphilly Detached, an established residential building | £265,000 | 2019-10-04 | £377,904 |
| Moat House Inn, 30 Lon Y Llyn, Caerphilly, Caerphilly Other, an established residential building | £554,098 | 2019-08-09 | £712,616 |
CF83 1BY area has a low unemployment rate. According to Census 2021, 2% residents of this area were unemployed, while the average in the UK was 4.83%. A low level of unemployment in an area indicates a strong job market, where most people who are seeking work can find employment. This generally reflects a healthy economy in the area.
| Full-Time Employee | 100 |
| Retired | 79 |
| Part-Time Employee | 24 |
| Self-Employed | 17 |
| Long-Term Sick or disabled | 12 |
| Looking after home or family | 11 |
| Other | 9 |
| Student (economically inactive) | 8 |
| Unemployed | 5 |
| Full-Time Student (with or without job) | 3 |
| Wholesale and retail trade; repair of motor vehicles and motor cycles | 24 |
| Manufacturing | 17 |
| Construction | 16 |
| Human health and social work activities | 15 |
| Public administration and defence; compulsory social security | 13 |
| Professional, scientific and technical activities | 11 |
| Education | 10 |
| Financial and insurance activities | 9 |
| Other | 6 |
| Administrative and support service activities | 4 |
| Accommodation and food service activities | 3 |
| Transport and storage | 3 |
| Information and communication | 2 |
| Water supply; sewerage, waste management and remediation activities | 1 |
| Electricity, gas, steam and air conditioning supply | 1 |
| Ofsted Overall Effectiveness | Distance | Establishment Type | Has Nursery Classes | Gender | More Info | |
|---|---|---|---|---|---|---|
| Ysgol Gynradd Gymraeg Y Castell Crescent Road , CF83 1WH | - not rated | 697 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Cwrt Rawlin Primary School Cae Meillion , CF83 1SN | - not rated | 699 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| St Martin's School Hillside , CF83 1UW | - not rated | 907 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Hendre Junior School St Cenydd Road , Trecenydd CF83 2RP | - not rated | 1,253 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Hendre Infants School St Cenydd Road , Trecenydd CF83 2RP | - not rated | 1,253 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
School statistics for this postcode are based on Ofsted rankings.
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| The Beech Tree Coffee House | Caerphilly Miners Centre, The Miners, 1 Beech Tree View | 203 yd | |
| Personnel Hygiene Services Staff Canteen | P H S Group Ltd, Western Industrial Estate | 395 yd | |
| Creazione Cafe | Creazione Fitness Village, Block E - Sparks House, Western Industrial Estate | 482 yd | |
| Funtastic Kids Play Ltd | Unit 1, Block F - Forward House, Western Industrial Estate | 482 yd | |
| Esquires Coffee | Unit 7, Castle View Shopping Centre, Cae Meillion | 757 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| The Moathouse | 30 Lon-Y-Llyn | 2 yd | |
| Cwrt Rawlin Inn | Cwrt Rawlin Inn, Cae Meillion | 762 yd | |
| The Malcolm Uphill | 87-91 Cardiff Road | 851 yd | |
| Kings Arms | 46 Cardiff Road | 896 yd | |
| The Aviary (Caerphilly ) Ltd | Uned A, 42 Cardiff Road | 910 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Pagoda | Unit 4, Castle View Shopping Centre, Cae Meillion | 751 yd | |
| Domino's Pizza | Unit 8, Castle View Shopping Centre, Cae Meillion | 757 yd | |
| Express Takeaway | 3 Cae Meillion | 762 yd | |
| Castle Gate Restaurant | Castlegate Restaurant And Takeaway, 5 Cae Meillion | 762 yd | |
| Jack's Plaice | Shop Unit, 8 Pentrebane Street | 812 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Tesco | Tesco Express, 1-2 Cae Meillion | 762 yd | |
| Iceland | 6-12 Cardiff Road | 992 yd |
This statistics are based on Active Places Data - Contains Data © Sport England
| Percentage of premises that have Superfast Broadband (30Mbit/s or greater) coverage from fixed broadband | 100.0% |
| Percentage of premises that have Ultrafast Broadband (100Mbit/s or greater) coverage from fixed broadband | 100.0% |
| Percentage of premises that have Ultrafast Broadband (300Mbit/s or greater) coverage from fixed broadband | 100.0% |
| Percentage of premises that have coverage from a Gigabit capable service from fixed broadband | 100.0% |
| Percentage of premises unable to receive 2Mbit/s | 0.0% |
| Percentage of premises unable to receive 5Mbit/s | 0.0% |
| Percentage of premises unable to receive 10Mbit/s | 0.0% |
| Percentage of premises unable to receive 30Mbit/s | 0.0% |
| Median download speed | 80 Mbit/s |
| Average download speed | 100.8 Mbit/s |
| Minimum download speed | 350 Mbit/s |
| Maximum download speed | 350 Mbit/s |
| Median upload speed | 16 Mbit/s |
| Average upload speed | 17.3 Mbit/s |
| Maximum upload speed | 35 Mbit/s |
Broadband statistics are based on Ofcom's Communications Market Report (CMR) 2022.