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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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Hamilton County ZIP Codes

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

County State ZIP Code City Area Codes
Hamilton County OH 45111 Camp Dennison 283, 513
Hamilton County OH 45174 Terrace Park 283, 513
Hamilton County OH 45201 Cincinnati 513
Hamilton County OH 45202 Cincinnati 283, 513
Hamilton County OH 45203 Cincinnati 283, 513, 859
Hamilton County OH 45204 Cincinnati 283, 513, 859
Hamilton County OH 45205 Cincinnati 283, 513
Hamilton County OH 45206 Cincinnati 283, 513
Hamilton County OH 45207 Cincinnati 283, 513
Hamilton County OH 45208 Cincinnati 283, 513
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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.