In 2019, Johnson County, IA had a population of 149k people with a median age of 30.3 and a median household income of $62,542. Between 2018 and 2019 the population of Johnson County, IA grew from 147,001 to 148,577, a 1.07% increase and its median household income grew from $61,640 to $62,542, a 1.46% increase.
The 5 largest ethnic groups in Johnson County, IA are White (Non-Hispanic) (78.4%), Black or African American (Non-Hispanic) (7.2%), Asian (Non-Hispanic) (6.22%), White (Hispanic) (3.34%), and Two+ (Non-Hispanic) (2.03%). 0% of the households in Johnson County, IA speak a non-English language at home as their primary language.
91.7% of the residents in Johnson County, IA are U.S. citizens.
In 2019, the median property value in Johnson County, IA was $227,600, and the homeownership rate was 58.5%. Most people in Johnson County, IA drove alone to work, and the average commute time was 18.3 minutes. The average car ownership in Johnson County, IA was 2 cars per household.