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 52595 University Park Mahaska County 641
IA 52601 Burlington Des Moines County 309, 319
IA 52619 Argyle Lee County 319, 660
IA 52620 Bonaparte Van Buren County 319, 660
IA 52621 Crawfordsville Washington County 319
IA 52623 Danville Des Moines County 319
IA 52624 Denmark Lee County 319
IA 52625 Donnellson Lee County 319
IA 52626 Farmington Van Buren County 319, 660
IA 52627 Fort Madison Lee County 217, 319, 447
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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.