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	50254	Thayer	Union County	`641`
IA	50255	Thornburg	Keokuk County	`641`
IA	50256	Tracy	Marion County	`641`
IA	50257	Truro	Madison County	`641`
IA	50258	Union	Hardin County	`641`
IA	50259	Gifford	Hardin County	`641`
IA	50261	Van Meter	Dallas County	`515`
IA	50262	Van Wert	Decatur County	`641`
IA	50263	Waukee	Dallas County	`515`
IA	50264	Weldon	Decatur 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.