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 50468 Rockford Floyd County 641
IA 50469 Rockwell Cerro Gordo County 641
IA 50470 Rowan Wright County 515, 641
IA 50471 Rudd Floyd County 641
IA 50472 Saint Ansgar Mitchell County 507, 641
IA 50473 Scarville Winnebago County 507, 641
IA 50475 Sheffield Franklin County 641
IA 50476 Stacyville Mitchell County 507, 641
IA 50477 Swaledale Cerro Gordo County 641
IA 50478 Thompson Winnebago County 507, 641
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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.