In 2020, Marion County, IL had a population of 37.5k people with a median age of 42.4 and a median household income of $49,925. Between 2019 and 2020 the population of Marion County, IL declined from 37,743 to 37,524, a −0.58% decrease and its median household income grew from $47,519 to $49,925, a 5.06% increase.
The 5 largest ethnic groups in Marion County, IL are White (Non-Hispanic) (90.6%), Black or African American (Non-Hispanic) (3.37%), Two+ (Non-Hispanic) (2.64%), White (Hispanic) (1.11%), and Asian (Non-Hispanic) (0.565%).
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.
99.5% of the residents in Marion County, IL are U.S. citizens.
In 2020, the median property value in Marion County, IL was $81,600, and the homeownership rate was 74.6%. Most people in Marion County, IL drove alone to work, and the average commute time was 19.4 minutes. The average car ownership in Marion County, IL was 2 cars per household.