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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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Sumner County ZIP Codes

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

County State ZIP Code City Area Codes
Sumner County KS 67004 Argonia 620
Sumner County KS 67013 Belle Plaine 316, 620
Sumner County KS 67022 Caldwell 580, 620
Sumner County KS 67031 Conway Springs 620
Sumner County KS 67051 Geuda Springs 580, 620
Sumner County KS 67103 Mayfield 620
Sumner County KS 67105 Milan 620
Sumner County KS 67106 Milton 316, 620
Sumner County KS 67119 Oxford 316, 620
Sumner County KS 67120 Peck 316, 620
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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.