In 2019, Piatt County, IL had a population of 16.4k people with a median age of 42.9 and a median household income of $70,849. Between 2018 and 2019 the population of Piatt County, IL declined from 16,427 to 16,401, a −0.158% decrease and its median household income grew from $69,271 to $70,849, a 2.28% increase.
The 5 largest ethnic groups in Piatt County, IL are White (Non-Hispanic) (96.2%), Two+ (Non-Hispanic) (1.12%), White (Hispanic) (0.823%), Black or African American (Non-Hispanic) (0.555%), and Asian (Non-Hispanic) (0.537%). 0% of the households in Piatt County, IL speak a non-English language at home as their primary language.
99.3% of the residents in Piatt County, IL are U.S. citizens.
In 2019, the median property value in Piatt County, IL was $138,600, and the homeownership rate was 82.5%. Most people in Piatt County, IL drove alone to work, and the average commute time was 22.2 minutes. The average car ownership in Piatt County, IL was 2 cars per household.