Sullivan County, IN — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
20,766
Male
11,294
54.4%
Female
9,472
45.6%
Median Age
41.3 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 Higher10.4%
High School or Higher41.1%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
6.9%
Disability
0.0%
Non-English Home
8.7%
Married
40.3%
Sullivan County, IN has a population of 20,766 according to 2023 Census Bureau estimates. The median age is 41.3 years. The largest racial or ethnic group is White at 91.1% of the population. 10.4% of residents hold a bachelor's degree or higher. 1.1% of residents are foreign-born.