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	50012	Ames	Story County	`515`
IA	50013	Ames	Story County	`515`
IA	50014	Ames	Story County	`515`
IA	50020	Anita	Cass County	`641, 712`
IA	50021	Ankeny	Polk County	`515`
IA	50022	Atlantic	Cass County	`712`
IA	50023	Ankeny	Polk County	`515`
IA	50025	Audubon	Audubon County	`641, 712`
IA	50026	Bagley	Guthrie County	`515, 641, 712`
IA	50027	Barnes City	Mahaska 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.