U.S. postal lookup

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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Delaware County ZIP Codes

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

County State ZIP Code City Area Codes
Delaware County OH 43003 Ashley 220, 419, 567, 740
Delaware County OH 43015 Delaware 220, 380, 419, 567, 614, 740
Delaware County OH 43021 Galena 220, 380, 614, 740
Delaware County OH 43032 Kilbourne 220, 740
Delaware County OH 43035 Lewis Center 220, 380, 614, 740
Delaware County OH 43061 Ostrander 220, 326, 380, 614, 740, 937
Delaware County OH 43065 Powell 220, 380, 614, 740
Delaware County OH 43066 Radnor 220, 740
Delaware County OH 43074 Sunbury 220, 419, 567, 740
Delaware County OH 43082 Westerville 220, 380, 614, 740
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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.