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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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Isabella County ZIP Codes

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

County State ZIP Code City Area Codes
Isabella County MI 48804 Mount Pleasant 989
Isabella County MI 48858 Mount Pleasant 989
Isabella County MI 48859 Mount Pleasant 989
Isabella County MI 48878 Rosebush 989
Isabella County MI 48883 Shepherd 989
Isabella County MI 48893 Weidman 989
Isabella County MI 48896 Winn 989
Isabella County MI 49310 Blanchard 231, 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.