There are 29 zip codes in Lake County, Illinois. The most populated is 60085, located in Waukegan. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6008571,465Waukegan
6007362,071Round Lake
6001046,674Barrington
6004743,750Lake Zurich
6008942,867Buffalo Grove
6003137,202Gurnee
6006037,131Mundelein
6003035,978Grayslake
6004634,854Lake Villa
6009931,523Zion
6003530,215Highland Park
6004829,452Libertyville
6001527,835Deerfield
6008727,815Waukegan
6006127,602Vernon Hills
6000224,398Antioch
6004521,159Lake Forest
6008417,301Wauconda
6006415,380North Chicago
6008814,143Great Lakes
6002011,051Fox Lake
6004410,271Lake Bluff
600839,699Wadsworth
600418,843Ingleside
600698,602Lincolnshire
600428,589Island Lake
600966,655Winthrop Harbor
600405,227Highwood
60075Russell
showing: 29 rows

Zip Codes in Lake County, Illinois by Population (2024)