CH25 postcode district: Birkenhead and around, Wirral

CH25 is a postcode district in England, with 36 postcodes in use in 1 sector. It has postcodes in Birkenhead. Its council is Wirral.

Postcodes in use
36
Sectors
1
Council
Wirral
Places
Birkenhead

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in CH25, by flood risk

Map of every postcode in CH25, by flood risk Of the 36 postcodes in CH25 that ONS places, 36 are not on the Environment Agency's at-risk list. Places named: Birkenhead and Tranmere. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A554 CH25 9BJ: not on the flood risk listCH25 9RA: not on the flood risk list Birkenhead and Tranmere Map of every postcode in CH25, by flood risk Of the 36 postcodes in CH25 that ONS places, 36 are not on the Environment Agency's at-risk list. Places named: Birkenhead and Tranmere. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Birkenhead and Tranmere
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 36

Of the 36 postcodes in CH25 that ONS places, 36 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

The middle of its postcodes: latitude 53.3970, longitude -3.0118. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

Is CH25 at risk of flooding?

None of the 36 postcodes in CH25 is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

Postcodes in CH25

Pick a sector, then a postcode. A sector is the district plus the next digit.

CH25 936 postcodes
UK postcode format explained

Places in CH25

Towns and villages with postcodes in CH25, and how many each has here.

Birkenhead postcodes,36

Who covers CH25

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Birkenhead36

Police force areas

  • Merseyside36

Next to CH25

CH8 postcode district CH26 postcode district All CH districts Birkenhead postcodes

"Next to" is by number: the districts before and after CH25 in the CH area.

Check a postcode

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