Osea Island on the map

Location in EssexOsea Island sits where the marker shows within the county.

35,797
Population
13,986
Households
6 / 10
Deprivation decile
Around average
12
Schools nearby
£60,791
Avg. household income
1,844
Businesses
277
People per km²
Create a free area profile for Osea IslandDownload or embed an infographic of these statistics →

About Osea Island

Osea Island is located in Essex, England, within the CM9 postcode area. This private island is situated in the Blackwater Estuary and is accessible only by a causeway, which is submerged at high tide. The island spans approximately 200 acres and features a variety of landscapes, including marshland and woodland. It is primarily known for its residential properties and offers a unique setting for those seeking a retreat from the mainland.

The island has a small community and is often used for private events and gatherings. Facilities include a few accommodation options, making it suitable for short stays. Osea Island is also home to various wildlife, providing opportunities for nature enthusiasts to observe local fauna. The surrounding waters are popular for boating and fishing, adding to the island's appeal for outdoor activities.

School Ratings in Osea Island

There are 14 schools in and around Osea Island. A further 9 schools hold a Good rating.

House Prices in Osea Island

The average property price is £394K, with detached homes making up the majority of the housing stock at around £517K.

Crime and Anti-Social Behaviour in Osea Island

Recorded crime levels are lower than the national average. Anti-social behaviour is prevalent across Osea Island, with 15 recorded incidents in April 2026.

Deprivation and Employment in Osea Island

Osea Island sits around the middle of the national deprivation scale, according to the 2025 Index of Multiple Deprivation. Employment levels are broadly typical for the area, sitting close to the national average. Household incomes are broadly in line with the national average.

Healthcare in Osea Island

There is 1 GP surgery within three miles of Osea Island, the nearest being The Trinity Medical Practice (2.8 miles away).

Local Data for Osea Island

Dig deeper into the area around Osea Island with our free postcode tools.

Food Hygiene Ratings Hygiene scores for cafes, takeaways and shops Nearest GP Surgery Find the GP surgeries closest to a postcode Compare Areas Put two areas head to head House Prices Recent sale prices and trends

Property Prices 5,116 sales

Average Price £394K
£1K , £15.25M
Detached £517K 1,842
Semi £339K 1,505
Terraced £284K 1,055
Flat £202K 463

Schools & Education 12 nearby View all schools

10 Primary
1 Secondary
3 Other
Good 9

Ofsted ratings for schools in the CM9 postcode area.

Maylandsea Primary School Primary Good 2.8 miles Tolleshunt D'Arcy St Nicholas Primary Academy Primary 3.4 miles Heybridge Primary School Primary Good 3.4 miles Tollesbury School Primary Good 3.7 miles Mid Essex Co-Operative Academy Not applicable 3.8 miles Maldon Primary School Primary Good 3.8 miles Mal2 Maldon Family Hub Good 4 miles Plume School Secondary Good 4.1 miles Maldon Court Preparatory School Not applicable 4.1 miles Christchurch Church of England Primary School Primary Requires Improvement 4.2 miles St Francis Catholic Primary School, Maldon Primary Good 4.3 miles Wentworth Primary School Primary Good 4.3 miles

Household Income in Osea Island ONS 2023

The average total household income in Osea Island is approximately £60,791 a year before tax, 10% above the national average of £55,302. After tax and benefits, the average disposable (net) household income is around £43,310. These are modelled estimates from the Office for National Statistics for the financial year ending 2023.

Osea Island £60,791
England & Wales avg. £55,302

Net (after tax) household income averages £43,310.

Businesses in Osea Island ONS 2025

There are approximately 1,844 active businesses based in Osea Island, around 52 for every 1,000 residents. The local economy is dominated by small firms: about 89% are micro-businesses employing fewer than 10 people, while 37 are larger employers with 50 or more staff. Figures are from the Office for National Statistics UK Business Counts.

1,844 Total businesses
52 Per 1,000 residents
Micro, 0-9 89%
Small, 10-49 9%
Medium, 50-249 2%
Large, 250+ 0%

Deprivation and Employment in Osea Island IMD 2025

Osea Island sits around the national average for deprivation according to the 2025 Index of Multiple Deprivation. Employment and income levels are broadly typical, reflecting a mixed local economy. The area offers a balance of residential and commercial activity common to most parts of England.

Overall Deprivation
6/10
Income
7/10
Employment
7/10
Education
5/10
Health
7/10
Housing
4/10
Living Environment
5/10
Children 0-15 17%
Working age 59%
Older 65+ 24%
5,922 Children (0-15) 17%
21,024 Working Age 59%
8,848 Older (65+) 25%
Average Child Poverty (IDACI) 24.2% of children in income-deprived families
Average Older Person Poverty (IDAOPI) 10.8% of over-60s in income-deprived households
Data from English Indices of Deprivation 2025 · Contains public sector information licensed under the Open Government Licence v3.0

Crime in Osea Island 126 crimes · April 2026

Low Crime Area

Osea Island records relatively low levels of reported crime compared to national averages. Violence & sexual offences is the most commonly logged offence type, though overall numbers remain modest. The area is generally considered a safe and settled town with a strong sense of community.

Violence & Sexual Offences 58
Anti-Social Behaviour 15
Criminal Damage & Arson 13
Drugs 11
Other Theft 8
Public Order 8
Shoplifting 5
Other Crime 4
Vehicle Crime 2
Burglary 1
Weapons 1
Local Policing
Essex Maldon Visit force website →
Data from data.police.uk · Contains public sector information licensed under the Open Government Licence v3.0
Crime figures depend on reporting by individual police forces and may not reflect the full picture in all areas.

Nearest Train Stations 6 stations

Althorne (Essex) Train Station 5.3 miles
North Fambridge Train Station 5.7 miles
Burnham-On-Crouch Train Station 6.7 miles
Witham Train Station 8 miles
Kelvedon Train Station 8.5 miles
Hatfield Peverel Train Station 8.6 miles

Location

Nearby Towns & Villages 12 found

Goldhanger 1.4 miles Heybridge Basin 2.6 miles Ramsey Island 2.6 miles Maylandsea 2.6 miles Steeple 2.8 miles Mayland 3.1 miles Tolleshunt Major 3.2 miles Tolleshunt D'Arcy 3.2 miles St Lawrence 3.3 miles Mundon 3.5 miles Tollesbury 3.5 miles Broad Street Green 3.6 miles

Local Government

District Maldon
County Essex
Ward Heybridge West
Constituency Maldon
Parish Heybridge
Region East of England

Home Ownership in Osea Island

Of the 15,183 households in and around Osea Island, 75% are owned, 12% are socially rented and 12% are privately rented. Home ownership here is higher than the England and Wales average of 63%.

Owned 75% Social rented 12% Private rented 12%

Tenure from the 2021 Census (ONS), for the postcode districts covering Osea Island.

Frequently Asked Questions about Osea Island

What is the population of Osea Island?
Osea Island has a population of approximately 35,797 residents, based on the latest census figures for the surrounding postcode area.
What is the average house price in Osea Island?
The average property in and around Osea Island sold for about £393,595, based on HM Land Registry Price Paid records. That is around 13% above the England and Wales average of £349,091.
Is Osea Island a deprived area?
Osea Island sits around the national average for deprivation, with an Index of Multiple Deprivation decile of 6 out of 10, where 1 is the most deprived and 10 the least deprived.
What postcodes cover Osea Island?
Osea Island is covered by the CM9 postcode district.
How many schools are there in Osea Island?
There are 12 schools within easy reach of Osea Island, spanning primary, secondary and other phases.
Where is the nearest train station to Osea Island?
The nearest railway station to Osea Island is Althorne (Essex) Train Station, about 5.3 miles away.

Streets in CM9 30 shown View all streets

Abbey Turning 1 Abbotsmead 1 Acacia Drive 2 Acorn Close 1 America Street 1 Anchor Lane 2 Anchorage Hill 2 Anson Close 1 Ash Grove 1 Ashfield Farm Road 2 Atkins Crescent 6 Aveley Way 1 Avocet Way 1 Avro Lane 1 Back Road 1 Bakers Lane 2 Barber Close 1 Barbrook Avenue 1 Barnhall Road 5 Baron's Lane 1 Barrell Close 1 Basin Road 7 Bassetts Lane 1 Bates Road 3 Battle Rise 1 Beacon Hill 1 Beadle Place 1 Beaumont Way 1 Beckingham Road 5 Beckingham Street 7

Postcodes in CM9 50 shown View all postcodes

CM9 4AA CM9 4AB CM9 4AD CM9 4AG CM9 4AH CM9 4AJ CM9 4AL CM9 4AN CM9 4AP CM9 4AR CM9 4AS CM9 4AT CM9 4AU CM9 4AW CM9 4AX CM9 4AZ CM9 4BA CM9 4BB CM9 4BD CM9 4BE CM9 4BH CM9 4BJ CM9 4BL CM9 4BN CM9 4BP CM9 4BQ CM9 4BS CM9 4BT CM9 4BU CM9 4BW CM9 4DA CM9 4DB CM9 4DD CM9 4DE CM9 4DF CM9 4DG CM9 4DH CM9 4DJ CM9 4DN CM9 4DR CM9 4DT CM9 4DU CM9 4DW CM9 4DX CM9 4DY CM9 4DZ CM9 4EA CM9 4EB CM9 4ED CM9 4EE