Census Data released
April 2019 - The (July 1, 2018) County census population estimate released.
Polk County population is estimated at 487,204
on pace for 500K in 2020. Polk population is +56,564 since 2010
The 8-year population increase of +56,564 is greater than the individual total population of the 89 smallest counties. The increase also represents 51.5% of the State of Iowa’s increase in population during the past 8 years.
- Dallas County +24,045
- Johnson County +20,378
- Linn County +14,683
American Community Survey
Latest demographic and housing information for Polk County, Iowa. US Census released the ACS results on December 7,2017 (2016 - 5 year estimates)
Population / Race
Economic / Income
Earnings / Education
Population / Age
Additional datsets available on American FactFinder