Lake County, Illinois
Lake County is a county in Illinois with an estimated population of 708,760 in 2023. 45 cities, towns and Census places in it are indexed here.
Largest places in Lake County
Waukegan 87,642Buffalo Grove 42,482Mundelein 31,790North Chicago 30,416Highland Park 30,272Gurnee 30,193Round Lake Beach 26,783Vernon Hills 26,677Zion 24,206Grayslake 20,954Libertyville 20,332Lake Zurich 19,676Lake Forest 19,354Deerfield 18,884Round Lake 18,430Antioch 14,833Lindenhurst 14,339Beach Park 14,057Wauconda 13,891Fox Lake 10,805Hawthorn Woods 9,373Lake Villa 8,625Long Grove 8,263Lincolnshire 7,912Park City 7,842Round Lake Park 7,724Volo 7,016Winthrop Harbor 6,594Lakemoor 6,338Lake Bluff 5,534Highwood 5,304Lake Barrington 5,092Kildeer 4,377Green Oaks 4,060Riverwoods 3,737Deer Park 3,628Hainesville 3,489Wadsworth 3,459North Barrington 3,105Round Lake Heights 2,575
About Lake County
Lake County is one of the counties of Illinois. County governments in Illinois handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.