The HP21 postcode district is a postal district with a population of 33,355 and is within the HP Hemel Hempstead postcode area.
The area of the HP21 postcode district is 2.81 square miles which is 7.27 square kilometres or 1,796.24 acres.
There are 3 postcode sectors within the HP21 district.
|Postcode Sector||Delivery Office|
|HP21 7||Aylesbury Delivery Office|
|HP21 8||Aylesbury Delivery Office|
|HP21 9||Aylesbury Delivery Office|