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.

42,735 verified records
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Ohio ZIP Codes

Complete postal directory, details, and geographic map for the State of Ohio.

State ZIP Code City County Area Codes
OH 45041 Miamitown Hamilton County 283, 513
OH 45042 Middletown Butler County 283, 326, 513, 937
OH 45043 Middletown Butler County 513
OH 45044 Middletown Butler County 283, 513
OH 45050 Monroe Butler County 283, 513
OH 45051 Mount Saint Joseph Hamilton County 283, 513
OH 45052 North Bend Hamilton County 283, 513, 812, 859, 930
OH 45053 Okeana Butler County 283, 513, 765, 812, 930
OH 45054 Oregonia Warren County 283, 326, 513, 937
OH 45055 Overpeck Butler County 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.