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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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Chickasaw County ZIP Codes

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

County State ZIP Code City Area Codes
Chickasaw County IA 50603 Alta Vista 641
Chickasaw County IA 50630 Fredericksburg 319, 563, 641
Chickasaw County IA 50645 Ionia 319, 641
Chickasaw County IA 50658 Nashua 319, 641
Chickasaw County IA 50659 New Hampton 563, 641
Chickasaw County IA 50661 North Washington 641
Chickasaw County IA 52154 Lawler 563, 641
Chickasaw County MS 38850 Houlka 662
Chickasaw County MS 38851 Houston 662
Chickasaw County MS 38860 Okolona 662
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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.