The HP3 8 postcode sector is within the county of Hertfordshire in the East of England.
HP3 8 is a postcode sector within the HP3 postcode district which is within the HP Hemel Hempstead postcode area.
The Royal Mail delivery office for the HP3 8 postal sector is the Hemel Hempstead Delivery Office.
The area of the HP3 8 postcode sector is 3.47 square miles which is 8.98 square kilometres or 2,218.01 square acres.
The HP3 8 postcode sector is crossed by the M1 motorway.
Waterways within the HP3 8 postcode sector include the Grand Union Canal.
The HP3 8 postcode sector is crossed by a railway.
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