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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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Jefferson County ZIP Codes

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

County State ZIP Code City Area Codes
Jefferson County OH 43925 East Springfield 220, 740
Jefferson County OH 43926 Empire 220, 304, 681, 740
Jefferson County OH 43930 Hammondsville 220, 234, 330, 740
Jefferson County OH 43932 Irondale 220, 234, 330, 740
Jefferson County OH 43938 Mingo Junction 220, 304, 681, 740
Jefferson County OH 43939 Mount Pleasant 220, 740
Jefferson County OH 43941 Piney Fork 220, 740
Jefferson County OH 43943 Rayland 220, 304, 681, 740
Jefferson County OH 43944 Richmond 220, 740
Jefferson County OH 43948 Smithfield 220, 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.