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

Iowa ZIP Codes

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

State ZIP Code City County Area Codes
IA 52542 Cantril Van Buren County 319, 641, 660
IA 52543 Cedar Mahaska County 641
IA 52544 Centerville Appanoose County 641
IA 52548 Chillicothe Wapello County 641
IA 52549 Cincinnati Appanoose County 641, 660
IA 52550 Delta Keokuk County 641
IA 52551 Douds Van Buren County 319, 641
IA 52552 Drakesville Davis County 641
IA 52553 Eddyville Wapello County 641
IA 52554 Eldon Wapello County 641
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Geographic Map of Iowa

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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.