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.

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Dallas County ZIP Codes

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

County State ZIP Code City Area Codes
Dallas County TX 75088 Rowlett 214, 469, 945, 972
Dallas County TX 75089 Rowlett 214, 469, 945, 972
Dallas County TX 75099 Coppell 214
Dallas County TX 75104 Cedar Hill 214, 469, 682, 817, 945, 972
Dallas County TX 75106 Cedar Hill 214
Dallas County TX 75115 Desoto 214, 469, 945, 972
Dallas County TX 75116 Duncanville 214, 469, 945, 972
Dallas County TX 75123 Desoto 214
Dallas County TX 75134 Lancaster 214, 469, 945, 972
Dallas County TX 75137 Duncanville 214, 469, 945, 972
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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.