In 2020, Marshall County, IL had a population of 11.6k people with a median age of 46.4 and a median household income of $57,303. Between 2019 and 2020 the population of Marshall County, IL declined from 11,679 to 11,562, a −1% decrease and its median household income declined from $58,465 to $57,303, a −1.99% decrease.
The 5 largest ethnic groups in Marshall County, IL are White (Non-Hispanic) (94.1%), Two+ (Non-Hispanic) (2.28%), White (Hispanic) (2.14%), Other (Hispanic) (0.692%), and Black or African American (Non-Hispanic) (0.32%).
None of the households in Marshall 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.
99.2% of the residents in Marshall County, IL are U.S. citizens.
In 2020, the median property value in Marshall County, IL was $105,700, and the homeownership rate was 80.6%. Most people in Marshall County, IL drove alone to work, and the average commute time was 27.8 minutes. The average car ownership in Marshall County, IL was 2 cars per household.