This feature class consists of polygons representing ZIP Code areas in Arlington
County. The United States Postal Service determines the boundaries, effectively
showing delivery areas for each of the post offices serving the County. The
boundary lines were determined using a national ZIP Code directory and internet
resources provided by the USPS. It has not been authorized by the USPS, and
should not construed as a legal document. This data is digitized and maintained
by Arlington County for purposes of geographic analysis and mapping. Inquiries
requiring “official” responses should be directed to the United States Postal
Service.