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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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Lehigh County ZIP Codes

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

County State ZIP Code City Area Codes
Lehigh County PA 18101 Allentown 484, 610, 835
Lehigh County PA 18102 Allentown 484, 610, 835
Lehigh County PA 18103 Allentown 484, 610, 835
Lehigh County PA 18104 Allentown 484, 610, 835
Lehigh County PA 18105 Allentown 484
Lehigh County PA 18106 Allentown 484, 610, 835
Lehigh County PA 18109 Allentown 484, 610, 835
Lehigh County PA 18175 Allentown 484
Lehigh County PA 18195 Allentown 484, 610, 835
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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.