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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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Bay County ZIP Codes

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

County State ZIP Code City Area Codes
Bay County MI 48634 Linwood 989
Bay County MI 48650 Pinconning 989
Bay County MI 48706 Bay City 989
Bay County MI 48707 Bay City 989
Bay County MI 48708 Bay City 989
Bay County MI 48710 University Center 989
Bay County MI 48732 Essexville 989
Bay County MI 48747 Munger 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.