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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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Gillespie County ZIP Codes

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

County State ZIP Code City Area Codes
Gillespie County TX 78618 Doss 325, 830
Gillespie County TX 78624 Fredericksburg 325, 830
Gillespie County TX 78631 Harper 325, 830
Gillespie County TX 78671 Stonewall 830
Gillespie County TX 78675 Willow City 325, 830

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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.