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	50525	Clarion	Wright County	`515, 641`
IA	50526	Clarion	Wright County	`515`
IA	50527	Curlew	Palo Alto County	`712`
IA	50528	Cylinder	Palo Alto County	`515, 712`
IA	50529	Dakota City	Humboldt County	`515`
IA	50530	Dayton	Webster County	`515`
IA	50531	Dolliver	Emmet County	`507, 712`
IA	50532	Duncombe	Webster County	`515`
IA	50533	Eagle Grove	Wright County	`515`
IA	50535	Early	Sac County	`712`

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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.