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	52736	Clinton	Clinton County	`563`
IA	52737	Columbus City	Louisa County	`319`
IA	52738	Columbus Junction	Louisa County	`319`
IA	52739	Conesville	Muscatine County	`319`
IA	52742	De Witt	Clinton County	`563`
IA	52745	Dixon	Scott County	`563`
IA	52746	Donahue	Scott County	`563`
IA	52747	Durant	Cedar County	`563`
IA	52748	Eldridge	Scott County	`563`
IA	52749	Fruitland	Muscatine County	`563`

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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.