In 2020, Polk County, IA had a population of 485k people with a median age of 35.7 and a median household income of $69,747. Between 2019 and 2020 the population of Polk County, IA grew from 479,612 to 485,418, a 1.21% increase and its median household income grew from $67,637 to $69,747, a 3.12% increase.
The 5 largest ethnic groups in Polk County, IA are White (Non-Hispanic) (77%), Black or African American (Non-Hispanic) (6.79%), White (Hispanic) (5.61%), Asian (Non-Hispanic) (4.75%), and Two+ (Non-Hispanic) (2.68%).
None of the households in Polk County, IA reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
94.9% of the residents in Polk County, IA are U.S. citizens.
In 2020, the median property value in Polk County, IA was $190,400, and the homeownership rate was 67.1%. Most people in Polk County, IA drove alone to work, and the average commute time was 19.6 minutes. The average car ownership in Polk County, IA was 2 cars per household.