National Harbor zip code
Zip code in National Harbor, MD
The location National Harbor belongs to Prince George's County, state of Maryland. National Harbor has been assigned with the zip code 20745.
The location name National Harbor is listed as unacceptable by the US Postal Service so any mailing should avoid it. Instead you can use Oxon Hill, the official name of the location. You can also use any of the following names: Forest Heights, Forest Hts.