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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Iowa ZIP Codes

Complete postal directory, details, and geographic map for the State of Iowa.

State	ZIP Code	City	County	Area Codes
IA	50515	Ayrshire	Palo Alto County	`712`
IA	50516	Badger	Webster County	`515`
IA	50517	Bancroft	Kossuth County	`515`
IA	50518	Barnum	Webster County	`515, 712`
IA	50519	Bode	Humboldt County	`515`
IA	50520	Bradgate	Humboldt County	`515, 712`
IA	50521	Burnside	Webster County	`515`
IA	50522	Burt	Kossuth County	`515`
IA	50523	Callender	Webster County	`515`
IA	50524	Clare	Webster County	`515, 712`

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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.