City Name WESLACO, TX Texas United States ZIP Code 5 Plus 4 ️
City Name WESLACO, TX Texas United States ZIP Code 5 Plus 4 ️ . The table below compares 78596 to the other 1,856 zip codes in texas by rank and percentile using july 1,. 140 n texas blvd, weslaco, texas: Stc Mid Valley Campus Map Zip Code Map from harforlangning2015.blogspot.com This postal code encompasses addresses in the city of weslaco, tx. 78599 is zip code located in weslaco, texas. The population is , making 78599 the 2nd largest zipcode in weslaco.