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	50846	Fontanelle	Adair County	`641`
IA	50847	Grant	Montgomery County	`712`
IA	50848	Gravity	Taylor County	`712`
IA	50849	Greenfield	Adair County	`515, 641`
IA	50851	Lenox	Taylor County	`641, 712`
IA	50853	Massena	Cass County	`641, 712`
IA	50854	Mount Ayr	Ringgold County	`641, 660`
IA	50857	Nodaway	Adams County	`641, 712`
IA	50858	Orient	Adair County	`515, 641`
IA	50859	Prescott	Adams County	`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.