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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.

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Palo Alto County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Palo Alto County.

County State ZIP Code City Area Codes
Palo Alto County IA 50515 Ayrshire 712
Palo Alto County IA 50527 Curlew 712
Palo Alto County IA 50528 Cylinder 515, 712
Palo Alto County IA 50536 Emmetsburg 515, 712
Palo Alto County IA 50562 Mallard 515, 712
Palo Alto County IA 50597 West Bend 515, 712
Palo Alto County IA 51342 Graettinger 712
Palo Alto County IA 51358 Ruthven 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.