Rock Island County Population 2018

Rock Island County's estimated population is 144,808 with a growth rate of -0.46% in the past year according to the most recent United States census data. Rock Island County is the 14th largest county in Illinois.

Year Population Growth Growth Rate
2017144,808-664-0.46%
2016145,472-777-0.53%
2015146,249-716-0.49%
2014146,965-565-0.38%
2013147,530-59-0.04%
2012147,5891970.13%
2011147,392-225-0.15%
2010147,617-1,106-0.74%
1990148,723-17,245-10.39%
1980165,968-766-0.46%
1970166,73415,74310.43%
1960150,99117,43313.05%
1950133,55820,23517.86%
1940113,32315,13215.41%
193098,1915,8946.39%
192092,29721,89331.10%
191070,40415,15527.43%
190055,24913,33231.81%
189041,9173,6159.44%
188038,3028,51928.60%
187029,7838,77841.79%
186021,00514,068202.80%
18506,9374,327165.79%
18402,6100.00%

Rock Island County Population Growth

Population Data via

Rock Island County Race Data

Race Population Percentage
White122,47184.57%
Black or African American14,99710.36%
Two or More Races4,0042.77%
Asian3,5862.48%
American Indian and Alaska Native8350.58%
Native Hawaiian and Other Pacific Islander650.04%

Rock Island County Population Pyramid

0k1k2k3k4k5k Male Population0k1k2k3k4k5k 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