ZIP Code 78590 is located in the county of Willacy in the state of Texas. 78590 ZIP Code is spread between the coordinates of +26.5011105 Latitude and -97.64425473 Longitude. 78590 ZIP Code is part of the 956 area code. There are 0 postal offices in zip code 78590.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 78590. Always when you mail a package or a letter, be attentive to mention the preferred or acceptable cities. Using any city in the list of unacceptable cities may result in unforseen delays.