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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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Iosco County ZIP Codes

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

County State ZIP Code City Area Codes
Iosco County MI 48730 East Tawas 989
Iosco County MI 48739 Hale 989
Iosco County MI 48743 Long Lake 989
Iosco County MI 48748 National City 989
Iosco County MI 48750 Oscoda 989
Iosco County MI 48761 South Branch 989
Iosco County MI 48763 Tawas City 989
Iosco County MI 48764 Tawas City 989
Iosco County MI 48770 Whittemore 989

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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.