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 48423 Davison Genesee County 810
MI 48426 Decker Sanilac County 989
MI 48427 Deckerville Sanilac County 810, 989
MI 48428 Dryden Lapeer County 248, 810, 947
MI 48429 Durand Shiawassee County 810, 989
MI 48430 Fenton Genesee County 248, 517, 810, 947
MI 48432 Filion Huron County 989
MI 48433 Flushing Genesee County 810
MI 48434 Forestville Sanilac County 989
MI 48435 Fostoria Tuscola County 810, 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.