Cook County Population 2018

Cook County's estimated population is 5,211,263 with a growth rate of -0.38% in the past year according to the most recent United States census data. Cook County is the 1st largest county in Illinois.

Year Population Growth Growth Rate
20175,211,263-20,093-0.38%
20165,231,356-14,475-0.28%
20155,245,831-7,925-0.15%
20145,253,7563,2580.06%
20135,250,49813,3240.25%
20125,237,17420,1250.39%
20115,217,04917,5720.34%
20105,199,47794,4101.85%
19905,105,067-148,588-2.83%
19805,253,655-238,714-4.35%
19705,492,369362,6447.07%
19605,129,725620,93313.77%
19504,508,792445,45010.96%
19404,063,34281,2192.04%
19303,982,123929,10630.43%
19203,053,017647,78426.93%
19102,405,233566,49830.81%
19001,838,735646,81354.27%
18901,191,922584,39896.19%
1880607,524257,55873.60%
1870349,966205,012141.43%
1860144,954101,569234.11%
185043,38533,184325.30%
184010,2010.00%

Cook County Population Growth

Population Data via

Cook County Race Data

Race Population Percentage
White3,432,10565.86%
Black or African American1,273,21424.43%
Asian378,9817.27%
Two or More Races97,4591.87%
American Indian and Alaska Native39,1880.75%
Native Hawaiian and Other Pacific Islander3,8760.07%

Cook County Population Pyramid

0k50k100k150k200k Male Population0k50k100k150k200k 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