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Cosham South

Middle area

North Portsmouth. 8,582 people (mid-2024 estimate) in 1.5 square kilometres.

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Radon Affected Area by middle area

Worked out by Open Index · 2022

Under 1%90% or more

About 100% of people in Cosham South live in a 1 km square that the radon atlas marks as a radon Affected Area.

Median sale price
£328,000
Joint 2,970th most expensive of 7,259
Worked out by Open Index
Population
8,328
Joint 2,994th most populated of 9,448
ONS Census 2021 · 2021
People in radon Affected Area squares
100%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
97.7%
UK 87.8%
Ofcom · Jan 2026

Recorded crime in Cosham South

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Cosham South at a rate of 89.6 per 1,000 people.

That compares with 126.7 per 1,000 people across Portsmouth.

Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.

Recorded by police, 12 months to August 2026
Kind of crimeRecorded
Shoplifting249
Violence and sexual offences234
Other crime111
Anti-social behaviour59
Vehicle crime39
Criminal damage and arson37
Robbery17
Burglary12
Drug offences8
Theft from the person3

Source: police.uk, 12 months to August 2026

How Cosham South compares

Each dot is a middle area. The black line marks the middle one.

Cosham SouthMiddle
Median sale price26 middle areas, Portsmouth · 2025
Median sale price: every middle area in Portsmouth26 areas from £134,000 to £390,000. The middle area is £262,500. Cosham South is £328,000.
£328,0003rd most expensive
Population26 middle areas, Portsmouth · 2021
Population: every middle area in Portsmouth26 areas from 5,312 to 10,937. The middle area is 7,970. Cosham South is 8,328.
8,32810th most populated
People in radon Affected Area squares26 middle areas, Portsmouth · 2022
People in radon Affected Area squares: every middle area in Portsmouth26 areas from 0.0% to 100.0%. The middle area is 100.0%. Cosham South is 100.0%.
100%joint most people in radon Affected Areas
Gigabit broadband coverage26 middle areas, Portsmouth · Jan 2026
Gigabit broadband coverage: every middle area in Portsmouth26 areas from 88.4% to 99.8%. The middle area is 98.1%. Cosham South is 97.7%.
97.7%joint 10th lowest

Is Cosham South safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Cosham South at a rate of 89.6 per 1,000 people.

That compares with 126.7 per 1,000 people across Portsmouth.

Across England as a whole, the recorded crime rate was 96.3 per 1,000 people.

In August 2026 alone, 64 cases of crime and anti-social behaviour were recorded in Cosham South.

In the 12 months to August 2026, the most common types were shoplifting (249), violence and sexual offences (234) and other crime (111).

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 Portsmouth

These figures are published for the whole of Portsmouth, not for each middle area, so they describe all of Portsmouth and not Cosham South alone. See Portsmouth

Average house price
£245,954
Up 0.1% in a year
HM Land Registry · Aug 2026
Median full-time pay
£36,022
95th lowest paid of 348
ONS earnings survey · 2025
House price to pay
6.8×
Joint 152nd most affordable of 348
Worked out by Open Index
Deprivation score
26.4
64th most deprived of 296
MHCLG · England only
Cosham South in brief

The median price paid for a home in Cosham South was £328,000 in 2025.

Cosham South had 8,328 usual residents at the census.

About 100% of people in Cosham South live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Cosham South, 97.7% of homes and businesses could get gigabit-capable broadband in January 2026.