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

Hays County ZIP Codes

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

County State ZIP Code City Area Codes
Hays County TX 78610 Buda 512, 737
Hays County TX 78619 Driftwood 512, 737
Hays County TX 78620 Dripping Springs 512, 737, 830
Hays County TX 78640 Kyle 512, 737
Hays County TX 78666 San Marcos 512, 737, 830
Hays County TX 78667 San Marcos 512
Hays County TX 78676 Wimberley 512, 737, 830
Hays County TX 78737 Austin 512, 737

Geographic Map of Hays 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.