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	52175	West Union	Fayette County	`563`
IA	52201	Ainsworth	Washington County	`319`
IA	52202	Alburnett	Linn County	`319`
IA	52203	Amana	Iowa County	`319`
IA	52204	Amana	Iowa County	`319`
IA	52205	Anamosa	Jones County	`319, 563`
IA	52206	Atkins	Benton County	`319`
IA	52207	Baldwin	Jackson County	`563`
IA	52208	Belle Plaine	Benton County	`319, 641`
IA	52209	Blairstown	Benton County	`319`

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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.