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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 77337 Hufsmith 713
Harris County TX 77338 Humble 281, 346, 713, 832
Harris County TX 77339 Kingwood 281, 346, 713, 832
Harris County TX 77345 Kingwood 281, 346, 713, 832
Harris County TX 77346 Humble 281, 346, 713, 832
Harris County TX 77347 Humble 713
Harris County TX 77373 Spring 281, 346, 713, 832
Harris County TX 77375 Tomball 281, 346, 713, 832
Harris County TX 77377 Tomball 281, 346, 713, 832
Harris County TX 77379 Spring 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.