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	50232	Reasnor	Jasper County	`641`
IA	50233	Redfield	Dallas County	`515, 641`
IA	50234	Rhodes	Marshall County	`641`
IA	50235	Rippey	Greene County	`515`
IA	50236	Roland	Story County	`515`
IA	50237	Runnells	Polk County	`515, 641`
IA	50238	Russell	Lucas County	`641`
IA	50239	Saint Anthony	Marshall County	`641`
IA	50240	Saint Charles	Madison County	`515, 641`
IA	50241	Saint Marys	Warren County	`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.