Johnson County, IL — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
13,350
Male
7,606
57.0%
Female
5,744
43.0%
Median Age
42.7 yrs
Avg Household Size
2.8
Foreign Born
0.9%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher13.7%
High School or Higher37.4%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
6.3%
Disability
0.0%
Non-English Home
10.2%
Married
35.8%
Johnson County, IL has a population of 13,350 according to 2023 Census Bureau estimates. The median age is 42.7 years. The largest racial or ethnic group is White at 82.2% of the population. 13.7% of residents hold a bachelor's degree or higher. 0.9% of residents are foreign-born.