Cities in Lake County, Illinois by Population (2024)

There are 85 cities in Lake County, Illinois.

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Waukegan1Illinois86,83789,115-0.65%3,58624.22
Arlington Heights2Illinois72,94377,447-1.52%4,39116.61
Palatine3Illinois63,27467,696-1.72%4,48214.12
Hoffman Estates4Illinois48,96252,402-1.73%2,37520.61
Buffalo Grove5Illinois42,04643,092-0.62%4,3999.56
Wheeling6Illinois36,67639,196-1.69%4,2298.67
Northbrook7Illinois33,24235,122-1.39%2,51013.24
Mundelein8Illinois31,69431,5300.13%3,2619.72
North Chicago9Illinois30,27230,708-0.36%3,7868
Algonquin10Illinois30,22529,6770.46%2,41012.54
Highland Park11Illinois30,17330,1530.02%2,46612.23
Gurnee12Illinois29,95630,650-0.57%2,21713.51
McHenry13Illinois29,03527,1991.61%1,95814.83
Lake Hills14Illinois28,47328,927-0.4%2,79010.21
Vernon Hills15Illinois26,69626,822-0.12%3,4507.74
Round Lake Beach16Illinois26,55827,200-0.6%5,2655.04
Zion17Illinois24,00624,624-0.64%2,4179.93
Rolling Meadows18Illinois23,01824,110-1.17%4,0995.62
Grayslake19Illinois20,72621,210-0.58%1,89910.91
Libertyville20Illinois20,24320,561-0.39%2,2988.81
Lake Zurich21Illinois19,49319,755-0.33%2,8166.92
Lake Forest22Illinois19,15819,346-0.24%1,11417.20
Deerfield23Illinois18,74419,156-0.55%3,3845.54
Round Lake24Illinois18,29118,691-0.54%3,2905.56
Cary25Illinois17,85317,8070.07%2,7406.52
Prospect Heights26Illinois14,97715,995-1.67%3,5604.21
Antioch27Illinois14,93514,6110.55%1,8128.24
Lindenhurst28Illinois14,26314,373-0.19%3,1514.53
Beach Park29Illinois13,95314,231-0.49%1,9727.08
Wauconda30Illinois13,79914,065-0.48%2,7215.07
Gages Lake31Illinois11,8019,9393.98%3,9652.98
Fox Lake32Illinois10,72410,974-0.57%1,3697.83
Barrington33Illinois10,38710,703-0.76%2,2504.62
Hawthorn Woods34Illinois9,5249,0881.16%1,1718.14
Lake Villa35Illinois8,5688,726-0.45%1,3126.53
Long Grove36Illinois8,1938,349-0.47%66112.39
Lincolnshire37Illinois7,9077,937-0.09%1,7344.56
Island Lake38Illinois7,8758,033-0.49%2,3513.35
Park City39Illinois7,8147,882-0.22%6,7541.16
Round Lake Park40Illinois7,7417,6630.26%3,7502.06
Inverness41Illinois7,1397,585-1.53%1,0936.53
Volo42Illinois6,9556,2092.76%1,6874.12
Winthrop Harbor43Illinois6,5466,688-0.53%1,4124.64
Lakemoor44Illinois6,3756,1730.81%1,2025.30
Johnsburg45Illinois6,3686,3540.06%8787.25
Highwood46Illinois5,5815,0892.25%7,7510.72
Lake Bluff47Illinois5,4895,609-0.54%1,3474.08
Spring Grove48Illinois5,4895,4790.06%6069.05
Grandwood Park49Illinois5,1615,114-2.18%3,5721.45
Lake Barrington50Illinois5,1095,0810.14%8915.74
Wonder Lake51Illinois4,9603,9665.29%9994.96
South Barrington52Illinois4,9155,069-0.77%6597.46
Fox River Grove53Illinois4,5964,686-0.48%2,6851.71
Kildeer54Illinois4,4264,0841.98%1,0264.31
Green Oaks55Illinois4,0384,112-0.44%1,0123.99
Barrington Hills56Illinois3,9424,096-0.95%14626.99
Riverwoods57Illinois3,7053,787-0.54%9343.97
Deer Park58Illinois3,5963,674-0.53%9803.67
Hainesville59Illinois3,4623,540-0.55%1,8741.85
Wadsworth60Illinois3,4383,506-0.49%3499.84
Pistakee Highlands61Illinois3,2823,302-0.15%2,5561.28
East Dundee62Illinois3,0853,175-0.71%1,0542.93
North Barrington63Illinois3,0813,135-0.42%6524.72
Long Lake64Illinois2,9353,065-0.07%2,4871.18
Venetian Village65Illinois2,8352,5612.02%1,5981.77
Round Lake Heights66Illinois2,5552,615-0.58%4,4430.57
Fox Lake Hills67Illinois2,4022,1250.08%1,8941.27
Oakwood Hills68Illinois2,0542,068-0.15%1,8881.09
Prairie Grove69Illinois1,9421,960-0.21%3365.78
Knollwood70Illinois1,8421,6842.22%3,0450.60
Channel Lake71Illinois1,7841,7840%9891.80
Port Barrington72Illinois1,5551,581-0.38%1,3411.16
Forest Lake73Illinois1,3961,2921.9%3,9890.35
Lake Catherine74Illinois1,3331,2890.83%1,4660.91
Tower Lakes75Illinois1,1921,224-0.67%1,2970.92
Bull Valley76Illinois1,1001,114-0.27%1149.65
Third Lake77Illinois1,0841,108-0.55%1,8440.59
Bannockburn78Illinois1,0081,014-0.1%4972.03
McCullom Lake79Illinois959983-0.62%2,7640.35
Holiday Hills80Illinois601615-0.5%6430.93
Mettawa81Illinois5475290.92%1005.45
Indian Creek82Illinois528534-0.19%1,9780.27
Trout Valley83Illinois505513-0.39%1,1800.43
Burtons Bridge84Illinois161273-13.44%1,3090.12
Old Mill Creek85Illinois159163-0.63%1510.66
showing: 85 rows

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in Lake County, Illinois?

Waukegan is the largest city in Lake County.

What is the smallest city in Lake County, Illinois?

Old Mill Creek is the smallest city in Lake County.

How many cities are in Lake County?

There are 85 cities in Lake County, Illinois.

Frequently Asked Questions