The N21 1 postcode sector is within the county of Greater London in the Greater London area of England..
N21 1 is a postcode sector within the N21 postcode district which is within the N London - N postcode area.
The Royal Mail delivery office for the N21 1 postal sector is the Winchmore Hill Sdelivery Office.
The area of the N21 1 postcode sector is 0.86 square miles which is 2.23 square kilometres or 550.92 square acres.
Waterways within the N21 1 postcode sector include the Salmons Brook.
The N21 1 postcode sector is crossed by a railway.
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