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	50050	Churdan	Greene County	`515, 712`
IA	50051	Clemons	Marshall County	`641`
IA	50052	Clio	Wayne County	`641`
IA	50054	Colfax	Jasper County	`515, 641`
IA	50055	Collins	Story County	`515, 641`
IA	50056	Colo	Story County	`515, 641`
IA	50057	Columbia	Marion County	`641`
IA	50058	Coon Rapids	Carroll County	`712`
IA	50059	Cooper	Greene County	`515`
IA	50060	Corydon	Wayne County	`641, 660`

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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.