The HP5 1 postcode sector stands on the Buckinghamshire and Hertfordshire border in the South East of England.
HP5 1 is a postcode sector within the HP5 postcode district which is within the HP Hemel Hempstead postcode area.
The Royal Mail delivery office for the HP5 1 postal sector is the Chesham Delivery Office.
The area of the HP5 1 postcode sector is 6.65 square miles which is 17.22 square kilometres or 4,256.17 square acres.
Waterways within the HP5 1 postcode sector include the River Chess.
The Chilterns area of outstanding natural beauty covers part of the HP5 1 postcode district.
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