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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Iowa ZIP Codes

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

State ZIP Code City County Area Codes
IA 50833 Bedford Taylor County 641, 660, 712
IA 50835 Benton Ringgold County 641
IA 50836 Blockton Taylor County 641, 660
IA 50837 Bridgewater Adair County 641, 712
IA 50839 Carbon Adams County 641
IA 50840 Clearfield Taylor County 641
IA 50841 Corning Adams County 641, 712
IA 50842 Cromwell Union County 641
IA 50843 Cumberland Cass County 641, 712
IA 50845 Diagonal Ringgold 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.