Rock Island County Population 2017

Rock Island County's estimated population is 144,784 with a growth rate of -0.80% 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
2016144,784-1,174-0.80%
2015145,958-831-0.57%
2014146,789-720-0.49%
2013147,509-129-0.09%
2012147,6382270.15%
2011147,411-220-0.15%
2010147,631-1,092-0.73%
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
White122,47184.59%
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

0k1k2k3k4k5kRock Island County Male Population0k1k2k3k4k5kRock Island County Female Population

Population of Cities in Rock Island County

City 2010 Census 2016 Estimated Growth Growth Rate
Moline4348142250-1231-2.83%
Rock Island3900538210-795-2.04%
East Moline2130721135-172-0.81%
Silvis75207586660.88%
Milan51605038-122-2.36%
Coal Valley3719372120.05%
Carbon Cliff20872014-73-3.50%
Port Byron16471637-10-0.61%
Andalusia11781177-1-0.08%
Rapids City95996010.10%
Cordova672651-21-3.13%
Reynolds539512-27-5.01%
Hillsdale517505-12-2.32%
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