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	52232	Hartwick	Poweshiek County	`319, 641`
IA	52233	Hiawatha	Linn County	`319`
IA	52235	Hills	Johnson County	`319`
IA	52236	Homestead	Iowa County	`319`
IA	52237	Hopkinton	Delaware County	`319, 563`
IA	52240	Iowa City	Johnson County	`319`
IA	52241	Coralville	Johnson County	`319`
IA	52242	Iowa City	Johnson County	`319`
IA	52243	Iowa City	Johnson County	`319`
IA	52244	Iowa City	Johnson County	`319`

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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.