In 2020, Johnson County, IL had a population of 12.4k people with a median age of 43.8 and a median household income of $55,363. Between 2019 and 2020 the population of Johnson County, IL declined from 12,494 to 12,391, a −0.824% decrease and its median household income grew from $52,774 to $55,363, a 4.91% increase.
The 5 largest ethnic groups in Johnson County, IL are White (Non-Hispanic) (85.5%), Black or African American (Non-Hispanic) (10.3%), White (Hispanic) (2.49%), Two+ (Non-Hispanic) (0.517%), and Asian (Non-Hispanic) (0.347%).
None of the households in Johnson County, IL reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
98.9% of the residents in Johnson County, IL are U.S. citizens.
In 2020, the median property value in Johnson County, IL was $117,500, and the homeownership rate was 83.3%.
Most people in Johnson County, IL drove alone to work, and the average commute time was 24.6 minutes. The average car ownership in Johnson County, IL was 2 cars per household.