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	51008	Brunsville	Plymouth County	`712`
IA	51009	Calumet	O'Brien County	`712`
IA	51010	Castana	Monona County	`712`
IA	51011	Chatsworth	Sioux County	`712`
IA	51012	Cherokee	Cherokee County	`712`
IA	51014	Cleghorn	Cherokee County	`712`
IA	51015	Climbing Hill	Woodbury County	`712`
IA	51016	Correctionville	Woodbury County	`712`
IA	51018	Cushing	Woodbury County	`712`
IA	51019	Danbury	Woodbury County	`712`

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Geographic Map of Iowa

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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.