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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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Ontonagon County ZIP Codes

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

County State ZIP Code City Area Codes
Ontonagon County MI 49910 Bergland 906
Ontonagon County MI 49912 Bruce Crossing 906
Ontonagon County MI 49925 Ewen 906
Ontonagon County MI 49929 Greenland 906
Ontonagon County MI 49948 Mass City 906
Ontonagon County MI 49953 Ontonagon 906
Ontonagon County MI 49960 Rockland 906
Ontonagon County MI 49967 Trout Creek 906
Ontonagon County MI 49971 White Pine 906

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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.