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	50115	Guthrie Center	Guthrie County	`515, 641, 712`
IA	50116	Hamilton	Marion County	`641`
IA	50117	Hamlin	Audubon County	`641, 712`
IA	50118	Hartford	Warren County	`515`
IA	50119	Harvey	Marion County	`641`
IA	50120	Haverhill	Marshall County	`641`
IA	50122	Hubbard	Hardin County	`515, 641`
IA	50123	Humeston	Wayne County	`641`
IA	50124	Huxley	Story County	`515`
IA	50125	Indianola	Warren County	`515, 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.