U.S. postal lookup

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.

42,735 verified records
All states and U.S. territories
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State directory

Michigan ZIP Codes

Complete postal directory, details, and geographic map for the State of Michigan.

State ZIP Code City County Area Codes
MI 48103 Ann Arbor Washtenaw County 734
MI 48104 Ann Arbor Washtenaw County 734
MI 48105 Ann Arbor Washtenaw County 248, 734, 947
MI 48106 Ann Arbor Washtenaw County 734
MI 48107 Ann Arbor Washtenaw County 734
MI 48108 Ann Arbor Washtenaw County 734
MI 48109 Ann Arbor Washtenaw County 734
MI 48110 Azalia Monroe County 734
MI 48111 Belleville Wayne County 734
MI 48112 Belleville Wayne County 734
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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.