In 2018, Marion County, IL had a population of 38.1k people with a median age of 42.1 and a median household income of $46,102. Between 2017 and 2018 the population of Marion County, IL declined from 38,305 to 38,084, a -0.577% decrease and its median household income grew from $44,679 to $46,102, a 3.18% increase.
The 5 largest ethnic groups in Marion County, IL are White (Non-Hispanic) (91.3%), Black or African American (Non-Hispanic) (3.49%), Two+ (Non-Hispanic) (2.13%), White (Hispanic) (1.3%), and Asian (Non-Hispanic) (0.693%). 0% of the people in Marion County, IL speak a non-English language, and 99.3% are U.S. citizens.
In 2018, the median property value in Marion County, IL was $74,900, and the homeownership rate was 73.4%. Most people in Marion County, IL drove alone to work, and the average commute time was 19.8 minutes. The average car ownership in Marion County, IL was 2 cars per household.