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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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Allen County ZIP Codes

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

County State ZIP Code City Area Codes
Allen County OH 45808 Beaverdam 419, 567
Allen County OH 45809 Gomer 419, 567
Allen County OH 45817 Bluffton 419, 567
Allen County OH 45820 Cairo 419, 567
Allen County OH 45833 Delphos 419, 567
Allen County OH 45850 Harrod 326, 419, 567, 937
Allen County OH 45854 Lafayette 419, 567
Allen County OH 45887 Spencerville 419, 567
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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.