Mercer County, IL — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
15,619
Male
7,882
50.5%
Female
7,737
49.5%
Median Age
44.5 yrs
Avg Household Size
2.4
Foreign Born
1.1%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher13.5%
High School or Higher42.2%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
6.9%
Disability
0.0%
Non-English Home
4.8%
Married
51.9%
Mercer County, IL has a population of 15,619 according to 2023 Census Bureau estimates. The median age is 44.5 years. The largest racial or ethnic group is White at 94.8% of the population. 13.5% of residents hold a bachelor's degree or higher. 1.1% of residents are foreign-born.