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	50265	West Des Moines	Polk County	`515`
IA	50266	West Des Moines	Dallas County	`515`
IA	50268	What Cheer	Keokuk County	`319, 641`
IA	50269	Whitten	Hardin County	`641`
IA	50271	Williams	Hamilton County	`515`
IA	50272	Williamson	Lucas County	`641`
IA	50273	Winterset	Madison County	`515, 641`
IA	50274	Wiota	Cass County	`712`
IA	50275	Woodburn	Clarke County	`641`
IA	50276	Woodward	Dallas County	`515`

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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.