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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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Lyon County ZIP Codes

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

County State ZIP Code City Area Codes
Lyon County IA 51230 Alvord 712
Lyon County IA 51235 Doon 712
Lyon County IA 51237 George 712
Lyon County IA 51240 Inwood 605, 712
Lyon County IA 51241 Larchwood 507, 605, 712
Lyon County IA 51242 Lester 712
Lyon County IA 51243 Little Rock 507, 712
Lyon County IA 51246 Rock Rapids 507, 712
Lyon County KS 66801 Emporia 620
Lyon County KS 66830 Admire 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.