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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.

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Starr County ZIP Codes

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

County State ZIP Code City Area Codes
Starr County TX 78536 Delmita 956
Starr County TX 78545 Falcon Heights 956
Starr County TX 78547 Garciasville 956
Starr County TX 78548 Grulla 956
Starr County TX 78582 Rio Grande City 361, 956
Starr County TX 78584 Roma 361, 956
Starr County TX 78585 Salineno 956
Starr County TX 78588 San Isidro 361, 956
Starr County TX 78591 Santa Elena 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.