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
All states and U.S. territories
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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 50670 Shell Rock Butler County 319
IA 50671 Stanley Buchanan County 319, 563
IA 50672 Steamboat Rock Hardin County 641
IA 50673 Stout Grundy County 319
IA 50674 Sumner Bremer County 319, 563
IA 50675 Traer Tama County 319, 641
IA 50676 Tripoli Bremer County 319, 563
IA 50677 Waverly Bremer County 319
IA 50680 Wellsburg Grundy County 319, 641
IA 50681 Westgate Fayette County 319, 563
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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.