How Many Postcodes Are There in the UK? Format and Coverage Explained
People ask “how many postcodes in UK” and “how many UK postcodes” when they want scale, not a single street. The UK has more than 1.7 million live unit postcodes, organised into areas, districts, and sectors.
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How many postcodes in the UK?
Official geography products report well over a million live unit postcodes across the UK, with totals that change as addresses are created or retired. That is why “how many postcodes in UK” does not have one permanent integer forever—but the order of magnitude stays above 1.7 million live codes in current ONS-style products.
For property research you rarely need the national total. You need the exact full postcode on the title, then sold prices, stations, and local risk checks.
Useful links
- UK postcode format guideinternal
- Most popular postcodes UKinternal
- Map searchinternal
- ONS / National Statistics geography (postcodes)external
What is a UK postcode?
A UK postcode is an alphanumeric code that identifies a small group of delivery points. Formats such as SW1A 1AA, M1 1AA, and B1 1AA are all valid. Learn the outward and inward parts in our format guide.
If you searched “what is my UK postcode”, use Royal Mail finders for your address, then paste the result into Postcode Insights tools.
Useful links
- UK postcode format guideinternal
- Area insightsinternal
- Price paid data (HM Land Registry)internal
- Nearest stationsinternal
Frequently asked questions
How many postcodes are there in the UK?
There are more than 1.7 million live unit postcodes in current UK geography datasets. Exact totals change as addresses are added or removed.
What is a UK postcode?
A UK postcode is a short alphanumeric code (typically 5–7 characters plus a space) used for mail delivery and property records, for example SW1A 1AA.
How are UK postcodes structured?
They split into an outward code (area + district) and an inward code (sector + unit). See our UK postcode format guide for examples.
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