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.

42,735 verified records
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State directory

Kentucky ZIP Codes

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

State ZIP Code City County Area Codes
KY 42409 Dixon Webster County 270, 364
KY 42410 Earlington Hopkins County 270, 364
KY 42411 Fredonia Caldwell County 270, 364
KY 42413 Hanson Hopkins County 270, 364
KY 42419 Henderson Henderson County 270
KY 42420 Henderson Henderson County 270, 364, 812, 930
KY 42431 Madisonville Hopkins County 270, 364
KY 42436 Manitou Hopkins County 270, 364
KY 42437 Morganfield Union County 270, 364
KY 42440 Mortons Gap Hopkins County 270, 364
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Geographic Map of Kentucky

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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.