Mason County, IL — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
12,878
Male
6,355
49.3%
Female
6,523
50.7%
Median Age
45.5 yrs
Avg Household Size
2.2
Foreign Born
0.4%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher12.4%
High School or Higher40.0%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
6.1%
Disability
0.0%
Non-English Home
5.8%
Married
43.1%
Mason County, IL has a population of 12,878 according to 2023 Census Bureau estimates. The median age is 45.5 years. The largest racial or ethnic group is White at 96.0% of the population. 12.4% of residents hold a bachelor's degree or higher. 0.4% of residents are foreign-born.