Johnson County, IA — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
154,881
Male
77,001
49.7%
Female
77,880
50.3%
Median Age
30.8 yrs
Avg Household Size
2.4
Foreign Born
10.3%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher32.5%
High School or Higher41.9%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
3.2%
Disability
0.0%
Non-English Home
2.2%
Married
37.2%
Johnson County, IA has a population of 154,881 according to 2023 Census Bureau estimates. The median age is 30.8 years. The largest racial or ethnic group is White at 77.6% of the population. 32.5% of residents hold a bachelor's degree or higher. 10.3% of residents are foreign-born.