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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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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 43240 Columbus 220, 380, 614, 740
Delaware County OK 74331 Afton 539, 918
Delaware County OK 74338 Colcord 479, 539, 918
Delaware County OK 74342 Eucha 539, 918
Delaware County OK 74344 Grove 417, 539, 918
Delaware County OK 74345 Grove 918
Delaware County OK 74346 Jay 417, 479, 539, 918
Delaware County OK 74347 Kansas 539, 918
Delaware County OK 74359 Oaks 539, 918
Delaware County OK 74364 Rose 539, 918
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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.