Rock Island County, IL — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
142,995
Male
70,765
49.5%
Female
72,230
50.5%
Median Age
40.3 yrs
Avg Household Size
2.3
Foreign Born
8.3%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher16.5%
High School or Higher37.6%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
5.5%
Disability
0.0%
Non-English Home
6.7%
Married
40.0%
Rock Island County, IL has a population of 142,995 according to 2023 Census Bureau estimates. The median age is 40.3 years. The largest racial or ethnic group is White at 73.0% of the population. 16.5% of residents hold a bachelor's degree or higher. 8.3% of residents are foreign-born.