UK Postcode Geography

This page provides a brief overview of the postcode geography in the UK.

• There are approximately 1.7 million unit postcodes in the UK. A unit postcode is the whole postcode, e.g. TN30 7DF.
• The next level up is the postcode sector, e.g. TN30 7. There are approximately 11,000 of these in the UK.
• The next level up is the postcode district, e.g. TN30. There are approximately 3,000 of these in the UK.
• The top level of postcode geography in the UK is the postcode area, e.g. TN. There are 121 postcode areas in the UK.