"Great Lakes, IL" ZIP Code Clarification: It's a Region, Not a City

There is no single ZIP code for "Great Lakes, IL" because "Great Lakes" is a geographic region, not a municipality. The term refers to the Great Lakes megalopolis—a binational urban corridor spanning eight U.S. states and two Canadian provinces around the five Great Lakes.

The Great Lakes Region (U.S. Side)

Eight States: Illinois, Indiana, Michigan, Minnesota, Ohio, Wisconsin, Pennsylvania, New York

Each state contains dozens to hundreds of ZIP codes. Major metropolitan anchors:

• Chicago, IL: 606xx (600+ codes)
• Detroit, MI: 482xx
• Cleveland, OH: 441xx
• Milwaukee, WI: 532xx
• Buffalo, NY: 142xx
• Duluth, MN: 558xx
• Gary, IN: 464xx
• Erie, PA: 165xx

Possible Confusion Sources

• Naval Station Great Lakes (North Chicago, IL): ZIP 60088 (base-only)
• Great Lakes, Illinois as a mailing address: Sometimes used for the naval base
• Great Lakes Crossing Outlets (Auburn Hills, MI): Mall, not a place

How to Find the Right ZIP

Identify the specific city, address, or facility you need. Use USPS ZIP Code Lookup with complete address. For the naval base: 60088. For any other location: search by actual municipality.

The Great Lakes region encompasses ~60 million people across thousands of ZIP codes—no single code represents this vast freshwater heartland.