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

Maps and coordinates

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	50126	Iowa Falls	Hardin County	`515, 641`
IA	50127	Ira	Jasper County	`641`
IA	50128	Jamaica	Guthrie County	`515, 641`
IA	50129	Jefferson	Greene County	`515, 641, 712`
IA	50130	Jewell	Hamilton County	`515`
IA	50131	Johnston	Polk County	`515`
IA	50132	Kamrar	Hamilton County	`515`
IA	50133	Kellerton	Ringgold County	`641`
IA	50134	Kelley	Story County	`515`
IA	50135	Kellogg	Jasper County	`641`

Page 10 of 107

Geographic Map of Iowa

Postal context

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.