Mercer County, IL has a population of 15,971 people with a median age of 44.8 and a median household income of $55,750. Between 2015 and 2016 the population of Mercer County, IL declined from 16,107 to 15,971, a 0.84% decrease and its median household income grew from $54,757 to $55,750, a 1.81% increase.
The population of Mercer County, IL is 96% White, 2.1% Hispanic, and 0.96% Two+. 1.39% of the people in Mercer County, IL speak a non-English language, and 99% are U.S. citizens.
The largest universities in Mercer County, IL are Western Illinois University, with 2,871 graduates, Spoon River College, with 359 graduates, and Monmouth College, with 314 graduates.
The median property value in Mercer County, IL is $98,900, and the homeownership rate is 77.9%. Most people in Mercer County, IL commute by Drove Alone, and the average commute time is 25.3 minutes. The average car ownership in Mercer County, IL is 2 cars per household.
Mercer County, IL is the 72nd most populated county in Illinois and borders Henderson County, IL; Henry County, IL; Knox County, IL; Rock Island County, IL; Warren County, IL; Des Moines County, IA; Louisa County, IA& 2 more.