The location Northwestern, LA has an unique ZIP Codes assigned (71457). Although this location name (Northwestern, LA) is set as NOT ACCEPTABLE (meaning it is an inadequate city name). So looking for the ZIP Code 71457 we have found out the following locations (for your mailing or form filling you should use an ACCEPTABLE or PRIMARY location name).
|City Name||ZIP Code||ZIP Type||Estimated Population|
Northwestern, LA belongs to Natchitoches county. Check the list of Natchitoches county ZIP Code.
Check the list of Louisiana ZIP Code.
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