In 2017, Johnston, IA had a population of 20.2k people with a median age of 40.7 and a median household income of $94,539. Between 2016 and 2017 the population of Johnston, IA grew from 19,491 to 20,172, a 3.49% increase and its median household income declined from $95,565 to $94,539, a -1.07% decrease.
The population of Johnston, IA is 90.6% White Alone, 4.45% Asian Alone, and 2.37% Black or African American Alone. 7.86% of the people in Johnston, IA speak a non-English language, and 95.3% are U.S. citizens.
The largest universities in Johnston, IA are La James International College-Johnston (44 degrees awarded in 2016).
The median property value in Johnston, IA is $248,100, and the homeownership rate is 72.8%. Most people in Johnston, IA commute by Drove Alone, and the average commute time is 19.4 minutes. The average car ownership in Johnston, IA is 2 cars per household.