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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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Piatt County ZIP Codes

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

County State ZIP Code City Area Codes
Piatt County IL 61813 Bement 217, 447
Piatt County IL 61818 Cerro Gordo 217, 447
Piatt County IL 61830 Cisco 217, 447
Piatt County IL 61839 De Land 217, 309, 447
Piatt County IL 61854 Mansfield 217, 309, 447
Piatt County IL 61855 Milmine 217, 447
Piatt County IL 61856 Monticello 217, 447
Piatt County IL 61884 White Heath 217, 447
Piatt County IL 61929 Hammond 217, 447
Piatt County IL 61936 La Place 217, 447

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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.