Zip Code 78557 — Hidalgo, TX

ZIP Code 78557 is associated with Hidalgo, TX, in Hidalgo County. The listed population estimate is 14,498; estimated density is 337.3 people per square mile. Among records with population estimates, it ranks #18 of 28 in Hidalgo County and #700 of 1,924 in TX.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (26.108440, -98.251180)

Data MetricLocal Statistic
Postal / Zip Code78557
Primary CityHidalgo
State / ProvinceTX
CountyHidalgo
Total Population14,498
Population Density337.3 people/sq mi
TimezoneAmerica/Chicago

How 78557 Compares

MetricZIP 78557Hidalgo County recordsTX records
Population estimate14,498891,915 (sum)30,188,035 (sum)
Population Density337.3 /sq mi----
County population rank#18 of 28----
State population rank#700 of 1,924----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in TX

ZIP CodeCityDistancePopulation estimate
ZIP 78503Mcallen3.7 mi22,621
ZIP 78577Pharr5.5 mi80,540
ZIP 78589San Juan6.5 mi40,231
ZIP 78501Mcallen7.5 mi58,935
ZIP 78516Alamo8.5 mi34,370

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →