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	52644	Mount Union	Henry County	`319`
IA	52645	New London	Henry County	`319`
IA	52646	Oakville	Louisa County	`309, 319`
IA	52647	Olds	Henry County	`319`
IA	52648	Pilot Grove	Lee County	`319`
IA	52649	Salem	Henry County	`319`
IA	52650	Sperry	Des Moines County	`319`
IA	52651	Stockport	Van Buren County	`319, 641`
IA	52652	Swedesburg	Henry County	`319`
IA	52653	Wapello	Louisa County	`309, 319`

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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.