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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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Franklin County ZIP Codes

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

County State ZIP Code City Area Codes
Franklin County MO 63068 New Haven 573, 636
Franklin County MO 63069 Pacific 636
Franklin County MO 63072 Robertsville 636
Franklin County MO 63073 Saint Albans 636
Franklin County MO 63077 Saint Clair 573, 636
Franklin County MO 63079 Stanton 573, 636
Franklin County MO 63080 Sullivan 573, 636
Franklin County MO 63084 Union 573, 636
Franklin County MO 63089 Villa Ridge 636
Franklin County MO 63090 Washington 573, 636
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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.