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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Pennsylvania ZIP Codes

Complete postal directory, details, and geographic map for the State of Pennsylvania.

State ZIP Code City County Area Codes
PA 17769 Slate Run Lycoming County 272, 570, 582, 814
PA 17771 Trout Run Lycoming County 272, 570
PA 17772 Turbotville Northumberland County 272, 570
PA 17773 Tylersville Clinton County 570
PA 17774 Unityville Lycoming County 272, 570
PA 17776 Waterville Lycoming County 272, 570
PA 17777 Watsontown Northumberland County 272, 570
PA 17778 Westport Clinton County 272, 570, 582, 814
PA 17779 Woolrich Clinton County 272, 570
PA 17801 Sunbury Northumberland County 272, 570
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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.