In 2017, Polk County, IA had a population of 482k people with a median age of 35.5 and a median household income of $65,995. Between 2016 and 2017 the population of Polk County, IA grew from 474,045 to 481,830, a 1.64% increase and its median household income grew from $64,067 to $65,995, a 3.01% increase.
The population of Polk County, IA is 77.5% White Alone, 8.43% Hispanic or Latino, and 6.21% Black or African American Alone. N/A% of the people in Polk County, IA speak a non-English language, and 95.2% are U.S. citizens.
The median property value in Polk County, IA is $180,700, and the homeownership rate is 68%. Most people in Polk County, IA commute by Drove Alone, and the average commute time is 18.8 minutes. The average car ownership in Polk County, IA is 2 cars per household.