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Find a Commonwealth ResourceFairfax County
Geographic boundaries of postal ZIP areas within Fairfax County. Contact: Fairfax County Department of Information Technology GIS DivisionData Accessibility: Publicly AvailableUpdate Frequency: As NeededLast Revision…
Updated Oct 8, 2026
Loudoun County
Metadata This feature class contains original Postal ZIP Code boundaries for Loudoun County provided by US Postal Service. ZIP Codes are used in address assignment and to provide the general public with postal area…
Updated Oct 10, 2026
