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
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Texas ZIP Codes

Complete postal directory, details, and geographic map for the State of Texas.

State ZIP Code City County Area Codes
TX 78577 Pharr Hidalgo County 956
TX 78578 Port Isabel Cameron County 956
TX 78579 Progreso Hidalgo County 956
TX 78580 Raymondville Willacy County 956
TX 78582 Rio Grande City Starr County 361, 956
TX 78583 Rio Hondo Cameron County 956
TX 78584 Roma Starr County 361, 956
TX 78585 Salineno Starr County 956
TX 78586 San Benito Cameron County 956
TX 78588 San Isidro Starr County 361, 956
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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.