In 2019, Marion County, IL had a population of 37.7k people with a median age of 42.2 and a median household income of $47,519. Between 2018 and 2019 the population of Marion County, IL declined from 38,084 to 37,743, a −0.895% decrease and its median household income grew from $46,102 to $47,519, a 3.07% increase.
The 5 largest ethnic groups in Marion County, IL are White (Non-Hispanic) (91.2%), Black or African American (Non-Hispanic) (3.62%), Two+ (Non-Hispanic) (2.18%), White (Hispanic) (1.3%), and Asian (Non-Hispanic) (0.644%). 0% of the households in Marion County, IL speak a non-English language at home as their primary language, and 99.4% of the residents in Marion County, IL are U.S. citizens.
In 2019, the median property value in Marion County, IL was $77,900, and the homeownership rate was 73.6%. Most people in Marion County, IL drove alone to work, and the average commute time was 19.3 minutes. The average car ownership in Marion County, IL was 2 cars per household.