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
Maps and coordinates
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 48461 North Branch Lapeer County 810, 989
MI 48462 Ortonville Oakland County 248, 810, 947
MI 48463 Otisville Genesee County 810, 989
MI 48464 Otter Lake Lapeer County 810, 989
MI 48465 Palms Sanilac County 810, 989
MI 48466 Peck Sanilac County 810
MI 48467 Port Austin Huron County 989
MI 48468 Port Hope Huron County 989
MI 48469 Port Sanilac Sanilac County 810
MI 48470 Ruth Huron County 989
Page 34 of 117

Geographic Map of Michigan

Postal context

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.