Lake County Population 2018

Lake County's estimated population is 703,520 with a growth rate of -0.20% in the past year according to the most recent United States census data. Lake County is the 3rd largest county in Illinois.

Year Population Growth Growth Rate
2017703,520-1,415-0.20%
2016704,935-10-0.00%
2015704,9453870.05%
2014704,5581340.02%
2013704,4242,2650.32%
2012702,1596400.09%
2011701,519-2,756-0.39%
2010704,275187,85736.38%
1990516,41876,04617.27%
1980440,37257,73415.09%
1970382,63888,98230.30%
1960293,656114,55963.96%
1950179,09758,00347.90%
1940121,09416,70716.00%
1930104,38730,10240.52%
192074,28519,22734.92%
191055,05820,55459.57%
190034,50410,26942.37%
189024,2352,93913.80%
188021,2962821.34%
187021,0142,75715.10%
186018,2574,03128.34%
185014,22611,592440.09%
18402,6340.00%

Lake County Population Growth

Population Data via

Lake County Race Data

Race Population Percentage
White577,54782.09%
Asian52,4307.45%
Black or African American52,3657.44%
Two or More Races14,4562.05%
American Indian and Alaska Native5,9780.85%
Native Hawaiian and Other Pacific Islander6370.09%

Lake County Population Pyramid

0k5k10k15k20k25k30k Male Population0k5k10k15k20k25k30k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990