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	50242	Searsboro	Poweshiek County	`641`
IA	50243	Sheldahl	Polk County	`515`
IA	50244	Slater	Story County	`515`
IA	50246	Stanhope	Hamilton County	`515`
IA	50247	State Center	Marshall County	`515, 641`
IA	50248	Story City	Story County	`515`
IA	50249	Stratford	Hamilton County	`515`
IA	50250	Stuart	Guthrie County	`515, 641`
IA	50251	Sully	Jasper County	`641`
IA	50252	Swan	Marion 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.