The HA3 9 postcode sector is within the county of Greater London in the Greater London area of England..
HA3 9 is a postcode sector within the HA3 postcode district which is within the HA Harrow postcode area.
The Royal Mail delivery office for the HA3 9 postal sector is the Harrow Central Delivery Office andHarrow Kenton & Weald Delivery Office.
The area of the HA3 9 postcode sector is 0.74 square miles which is 1.92 square kilometres or 473.86 square acres.
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