Jefferson County, IL — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
36,808
Male
18,949
51.5%
Female
17,859
48.5%
Median Age
41.1 yrs
Avg Household Size
2.4
Foreign Born
1.8%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher12.9%
High School or Higher35.9%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
6.3%
Disability
0.0%
Non-English Home
6.0%
Married
41.6%
Jefferson County, IL has a population of 36,808 according to 2023 Census Bureau estimates. The median age is 41.1 years. The largest racial or ethnic group is White at 84.9% of the population. 12.9% of residents hold a bachelor's degree or higher. 1.8% of residents are foreign-born.