In 2019, Polk County, IA had a population of 490k people with a median age of 36 and a median household income of $66,918. Between 2018 and 2019 the population of Polk County, IA grew from 487,204 to 490,161, a 0.607% increase and its median household income declined from $68,291 to $66,918, a −2.01% decrease.
The 5 largest ethnic groups in Polk County, IA are White (Non-Hispanic) (77%), Black or African American (Non-Hispanic) (7.62%), White (Hispanic) (7.01%), Asian (Non-Hispanic) (4.85%), and Two+ (Non-Hispanic) (1.62%). 0% of the households in Polk County, IA speak a non-English language at home as their primary language.
94.8% of the residents in Polk County, IA are U.S. citizens.
In 2019, the median property value in Polk County, IA was $198,400, and the homeownership rate was 66.3%. Most people in Polk County, IA drove alone to work, and the average commute time was 18.8 minutes. The average car ownership in Polk County, IA was 2 cars per household.