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	50446	Joice	Worth County	`641`
IA	50447	Kanawha	Hancock County	`515, 641`
IA	50448	Kensett	Worth County	`641`
IA	50449	Klemme	Hancock County	`641`
IA	50450	Lake Mills	Winnebago County	`507, 641`
IA	50451	Lakota	Kossuth County	`515`
IA	50452	Latimer	Franklin County	`641`
IA	50453	Leland	Winnebago County	`641`
IA	50454	Little Cedar	Mitchell County	`641`
IA	50455	Mc Intire	Mitchell County	`507, 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.