U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
Maps and coordinates
County directory

Hidalgo County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Hidalgo County.

County State ZIP Code City Area Codes
Hidalgo County TX 78537 Donna 956
Hidalgo County TX 78538 Edcouch 956
Hidalgo County TX 78539 Edinburg 956
Hidalgo County TX 78540 Edinburg 956
Hidalgo County TX 78541 Edinburg 956
Hidalgo County TX 78542 Edinburg 956
Hidalgo County TX 78543 Elsa 956
Hidalgo County TX 78549 Hargill 956
Hidalgo County TX 78557 Hidalgo 956
Hidalgo County TX 78558 La Blanca 956
Page 2 of 4

Geographic Map of Hidalgo County

Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.