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	52334	South Amana	Iowa County	`319`
IA	52335	South English	Keokuk County	`319, 641`
IA	52336	Springville	Linn County	`319`
IA	52337	Stanwood	Cedar County	`563`
IA	52338	Swisher	Johnson County	`319`
IA	52339	Tama	Tama County	`641`
IA	52340	Tiffin	Johnson County	`319`
IA	52341	Toddville	Linn County	`319`
IA	52342	Toledo	Tama County	`319, 641`
IA	52344	Troy Mills	Linn County	`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.