Williamson County, IL — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
66,902
Male
33,638
50.3%
Female
33,264
49.7%
Median Age
41.4 yrs
Avg Household Size
2.3
Foreign Born
2.0%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher19.7%
High School or Higher39.9%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
6.8%
Disability
0.0%
Non-English Home
5.4%
Married
43.5%
Williamson County, IL has a population of 66,902 according to 2023 Census Bureau estimates. The median age is 41.4 years. The largest racial or ethnic group is White at 89.2% of the population. 19.7% of residents hold a bachelor's degree or higher. 2.0% of residents are foreign-born.