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	50061	Cumming	Warren County	`515`
IA	50062	Melcher Dallas	Marion County	`515, 641`
IA	50063	Dallas Center	Dallas County	`515`
IA	50064	Dana	Greene County	`515`
IA	50065	Davis City	Decatur County	`641, 660`
IA	50066	Dawson	Dallas County	`515, 641`
IA	50067	Decatur	Decatur County	`641`
IA	50068	Derby	Lucas County	`641`
IA	50069	De Soto	Dallas County	`515`
IA	50070	Dexter	Dallas 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.