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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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Warren County ZIP Codes

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

County State ZIP Code City Area Codes
Warren County OH 45005 Franklin 283, 326, 513, 937
Warren County OH 45032 Harveysburg 283, 513
Warren County OH 45034 Kings Mills 283, 513
Warren County OH 45036 Lebanon 283, 326, 513, 937
Warren County OH 45039 Maineville 283, 513
Warren County OH 45040 Mason 283, 513
Warren County OH 45054 Oregonia 283, 326, 513, 937
Warren County OH 45065 South Lebanon 283, 513
Warren County OH 45066 Springboro 283, 326, 513, 937
Warren County OH 45068 Waynesville 283, 326, 513, 937
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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.