In 2023, Marion County, IL had a population of 37.3k people with a median age of 41.3 and a median household income of $60,839. Between 2022 and 2023 the population of Marion County, IL declined from 37,543 to 37,294, a −0.663% decrease and its median household income grew from $59,099 to $60,839, a 2.94% increase.
The 5 largest ethnic groups in Marion County, IL are White (Non-Hispanic) (89.6%), Black or African American (Non-Hispanic) (4.16%), Two+ (Non-Hispanic) (2.77%), White (Hispanic) (0.821%), and Two+ (Hispanic) (0.713%).
None of the households in Marion 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.
99.3% of the residents in Marion County, IL are U.S. citizens.
In 2023, the median property value in Marion County, IL was $100,100, and the homeownership rate was 74.5%.
Most people in Marion County, IL drove alone to work, and the average commute time was 20.4 minutes. The average car ownership in Marion County, IL was 2 cars per household.
Marion County, IL borders Clay County, IL, Clinton County, IL, Fayette County, IL, Jefferson County, IL, Washington County, IL, and Wayne County, IL.