In 2019, Warren County, IL had a population of 17.1k people with a median age of 39.8 and a median household income of $50,310. Between 2018 and 2019 the population of Warren County, IL declined from 17,338 to 17,146, a −1.11% decrease and its median household income grew from $49,607 to $50,310, a 1.42% increase.
The 5 largest ethnic groups in Warren County, IL are White (Non-Hispanic) (83.2%), White (Hispanic) (4.89%), Other (Hispanic) (4.64%), Black or African American (Non-Hispanic) (2.9%), and Asian (Non-Hispanic) (2.48%). 0% of the households in Warren County, IL speak a non-English language at home as their primary language, and 96.1% of the residents in Warren County, IL are U.S. citizens.
The largest universities in Warren County, IL are Monmouth College (238 degrees awarded in 2019).
In 2019, the median property value in Warren County, IL was $83,900, and the homeownership rate was 74.3%. Most people in Warren County, IL drove alone to work, and the average commute time was 18.4 minutes. The average car ownership in Warren County, IL was 2 cars per household.