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	50103	Garden Grove	Decatur County	`641`
IA	50104	Gibson	Keokuk County	`641`
IA	50105	Gilbert	Story County	`515`
IA	50106	Gilman	Marshall County	`641`
IA	50107	Grand Junction	Greene County	`515`
IA	50108	Grand River	Decatur County	`641`
IA	50109	Granger	Polk County	`515`
IA	50110	Gray	Audubon County	`712`
IA	50111	Grimes	Polk County	`515`
IA	50112	Grinnell	Poweshiek 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.