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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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Harris County ZIP Codes

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

County State ZIP Code City Area Codes
Harris County TX 77503 Pasadena 281, 346, 713, 832
Harris County TX 77504 Pasadena 281, 346, 713, 832
Harris County TX 77505 Pasadena 281, 346, 713, 832
Harris County TX 77506 Pasadena 281, 346, 713, 832
Harris County TX 77507 Pasadena 281, 346, 713, 832
Harris County TX 77508 Pasadena 713
Harris County TX 77520 Baytown 281, 346, 713, 832
Harris County TX 77521 Baytown 281, 346, 713, 832, 936
Harris County TX 77522 Baytown 713
Harris County TX 77530 Channelview 281, 346, 713, 832
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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.