# Long Rock, Marazion & St Erth

South west Cornwall. About 6,997 people (mid-2024 estimate) in 38 square kilometres.

Long Rock, Marazion & St Erth had 6,903 usual residents at the census (ONS Census 2021).

Ward. Code E05013845. In: [South West](https://openindex.co.uk/south-west) › [Cornwall](https://openindex.co.uk/cornwall)

## Key figures

- **Population: 6,903** (2021). Long Rock, Marazion & St Erth had 6,903 usual residents at the census (ONS Census 2021). Joint 4,091st most 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/cornwall/ward/long-rock-marazion-and-st-erth#f-population
- **People in radon Affected Area squares: 100%** (2022). About 100% of people in Long Rock, Marazion & St Erth 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/cornwall/ward/long-rock-marazion-and-st-erth#f-radon-affected-share
- **Gigabit broadband coverage: 53.4%** (January 2026). In Long Rock, Marazion & St Erth, 53.4% 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/cornwall/ward/long-rock-marazion-and-st-erth#f-gigabit-coverage
- **Claimant rate: 3.0%** (August 2026). In Long Rock, Marazion & St Erth, 3.0% 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/cornwall/ward/long-rock-marazion-and-st-erth#f-claimant-rate

## On the map

- [Radon Affected Area by ward](https://openindex.co.uk/map/radon-affected-areas?place=E05013845) (Worked out by Open Index · 2022): About 100% of people in Long Rock, Marazion & St Erth 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=E05013845) (UK House Price Index · August 2026): Published for whole councils, so the map colours all of Cornwall. The outline is Long Rock, Marazion & St Erth.
- [Crime and ASB by ward](https://openindex.co.uk/map/recorded-crime?place=E05013845) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for Long Rock, Marazion & St Erth.
- [Population by ward](https://openindex.co.uk/map/population?place=E05013845) (Census 2021, England and Wales): Long Rock, Marazion & St Erth had 6,903 usual residents at the census.

## How Long Rock, Marazion & St Erth compares

Each ward against every other ward the measure covers.

| Measure | Long Rock, Marazion & St Erth | Rank | Compared with |
| --- | --- | --- | --- |
| Population | 6,903 | 24th most populated | 87 wards, Cornwall · 2021 |
| People in radon Affected Area squares | 100% | joint most people in radon Affected Areas | 87 wards, Cornwall · 2022 |
| Gigabit broadband coverage | 53.4% | joint 25th lowest | 87 wards, Cornwall · Jan 2026 |
| Claimant rate | 3.0% | joint 34th highest | 87 wards, Cornwall · Aug 2026 |

## Is Long Rock, Marazion & St Erth safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Long Rock, Marazion & St Erth at a rate of 45.1 per 1,000 people.
That compares with 70.9 per 1,000 people across Cornwall.
Across England as a whole, the recorded crime rate was 96.3 per 1,000 people.
In August 2026 alone, 35 cases of crime and anti-social behaviour were recorded in Long Rock, Marazion & St Erth.
In the 12 months to August 2026, the most common types were violence and sexual offences (148), other crime (50) and criminal damage and arson (40).
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 Cornwall

These figures are published for the whole of Cornwall, not for each ward, so they describe all of Cornwall and not Long Rock, Marazion & St Erth alone. [See Cornwall](https://openindex.co.uk/cornwall)

- **Average house price: £274,570** (August 2026). Cornwall’s average house price was £274,570 in August 2026 (HM Land Registry). Down 2.9% in a year. Source: UK House Price Index, August 2026. Published 21 October 2026.
- **Median full-time pay: £35,002** (2025). Full-time workers living in Cornwall earned a median of £35,002 in 2025 (ONS earnings survey). 64th lowest paid of 348. Source: Annual Survey of Hours and Earnings, 2025. Published 23 October 2025.
- **House price to pay: 7.8×** (2025). A home in Cornwall costs 7.8 times local full-time pay. Joint 140th least affordable of 348. Source: Worked out by Open Index from the UK House Price Index and the ONS earnings survey. Published 21 October 2026.
- **Deprivation score: 22.3** (2025). Cornwall has a deprivation score of 22.3 in the English Indices of Deprivation 2025 (MHCLG). 112th most deprived of 296. Source: English Indices of Deprivation 2025, 2025. Published 30 October 2025.

## Long Rock, Marazion & St Erth in brief

Long Rock, Marazion & St Erth had 6,903 usual residents at the census.
About 100% of people in Long Rock, Marazion & St Erth live in a 1 km square that the radon atlas marks as a radon Affected Area.
In Long Rock, Marazion & St Erth, 53.4% of homes and businesses could get gigabit-capable broadband in January 2026.
In Long Rock, Marazion & St Erth, 3.0% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.

## About

- Type: Ward
- Code: E05013845
- Constituency: [St Ives †](https://openindex.co.uk/constituency/st-ives)
- Council: [Cornwall](https://openindex.co.uk/cornwall)
- Region: [South West](https://openindex.co.uk/south-west)
- Nation: [England](https://openindex.co.uk/england)
- Area: 37.82 km²
- People, mid-2024: 6,997*
- Neighbourhoods: 3
- Output areas: 25

* 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

[Ludgvan, Madron, Gulval & Heamoor](https://openindex.co.uk/cornwall/ward/ludgvan-madron-gulval-and-heamoor), [Porthleven, Breage & Germoe](https://openindex.co.uk/cornwall/ward/porthleven-breage-and-germoe), [St Ives East, Lelant & Carbis Bay](https://openindex.co.uk/cornwall/ward/st-ives-east-lelant-and-carbis-bay), [Gwinear-Gwithian & Hayle East](https://openindex.co.uk/cornwall/ward/gwinear-gwithian-and-hayle-east), [Crowan, Sithney & Wendron](https://openindex.co.uk/cornwall/ward/crowan-sithney-and-wendron), [Hayle West](https://openindex.co.uk/cornwall/ward/hayle-west)

## Latest updates for Long Rock, Marazion & St Erth

- 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/E05013845

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/cornwall/ward/long-rock-marazion-and-st-erth, or to one figure with its anchor, https://openindex.co.uk/cornwall/ward/long-rock-marazion-and-st-erth#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/cornwall/ward/long-rock-marazion-and-st-erth