Johnson County, IA has a population of 142,006 people with a median age of 29.9 and a median household income of $56,808. Between 2015 and 2016 the population of Johnson County, IA grew from 139,436 to 142,006, a 1.84% increase and its median household income grew from $55,700 to $56,808, a 1.99% increase.
The population of Johnson County, IA is 80.3% White, 6.15% Asian, and 6.02% Black. 13.6% of the people in Johnson County, IA speak a non-English language, and 92.9% are U.S. citizens.
The largest universities in Johnson County, IA are University of Iowa, with 8,419 graduates, La James International College-Iowa City, with 41 graduates, and The Salon Professional Academy-Iowa City, with 17 graduates.
The median property value in Johnson County, IA is $202,400, and the homeownership rate is 58.7%. Most people in Johnson County, IA commute by Drove Alone, and the average commute time is 17.8 minutes. The average car ownership in Johnson County, IA is 2 cars per household.
Johnson County, IA is the 4th most populated county in Iowa and borders Benton County, IA; Cedar County, IA; Iowa County, IA; Linn County, IA; Louisa County, IA; Muscatine County, IA; Washington County, IA& 2 more.