In 2018, Polk County, IA had a population of 487k people with a median age of 35.8 and a median household income of $68,291. Between 2017 and 2018 the population of Polk County, IA grew from 481,830 to 487,204, a 1.12% increase and its median household income grew from $65,995 to $68,291, a 3.48% increase.
The 5 largest ethnic groups in Polk County, IA are White (Non-Hispanic) (77.1%), White (Hispanic) (6.83%), Black or African American (Non-Hispanic) (6.47%), Asian (Non-Hispanic) (4.87%), and Two+ (Non-Hispanic) (2.79%). 0% of the people in Polk County, IA speak a non-English language, and 94% are U.S. citizens.
The largest universities in Polk County, IA are Des Moines Area Community College (3,798 degrees awarded in 2019), Drake University (1,528 degrees), and Grand View University (522 degrees).
In 2018, the median property value in Polk County, IA was $189,200, and the homeownership rate was 67.8%. Most people in Polk County, IA drove alone to work, and the average commute time was 18.9 minutes. The average car ownership in Polk County, IA was 2 cars per household.
Polk County, IA borders Boone County, IA, Dallas County, IA, Jasper County, IA, Madison County, IA, Marion County, IA, Story County, IA, and Warren County, IA.