Cosham population

10,226people · latest estimate

Photo: Michael Ford, CC BY-SA 2.0, via Wikimedia Commons

By James Burfield, SEO consultant, Bath · Page updated 18 September 2026 · GeoNames

Cosham has a population of 10,226, making it the 3rd largest place in Portsmouth.

of 3 in Portsmouth

Year-by-year official estimates for the wider area: Portsmouth population trends, 2001–2024.

Cosham in context

4 km

north-east to Waterlooville, the nearest larger town

538,598

people live within 10 km

#1,218

largest of 6,358 UK places

781

food businesses in Portsmouth

Distances are straight-line from the settlement's recorded coordinates. The 10 km figure sums the recorded places within that radius, so it describes how built-up the surroundings are rather than people per square kilometre.

The centre of Cosham sits in postcode district PO6.

Council tax

The area Band D council tax for Portsmouth, the billing authority covering Cosham, is £2,292 for 2026–27.

From MHCLG's council tax statistics (Table 9): the area average including police, fire and parish precepts, so it is the council's figure rather than the town's, and your own band depends on your property's 1991 valuation.

Common questions

What is the population of Cosham?

The populated place itself holds 10,226 residents. The wider Portsmouth council area recorded 214,321 in 2024. Each figure describes a different boundary and all are correct; the meanings table on this page says which is which, because a population without its boundary is not an answer.

Go deeper

Population since 2001

Portsmouth, year by year from ONS estimates

Postcode district PO6

Wards, constituencies and the deprivation profile

Nearby in Portsmouth

#	Place	Population
1	Portsmouth	208,100
2	Southsea	18,514

All 3 places in Portsmouth →