Total Population in Polk County, IA
ACS 2024 5-Year Estimates
How Polk County Compares
National Distribution
Where Polk County falls among all 3,222 U.S. counties for total population.
■ Polk County: 503,175
Ranking Context
| Rank | County | Value |
|---|---|---|
| #141 | Kane County, IL | 517,255 |
| #142 | Clark County, WA | 516,959 |
| #143 | Morris County, NJ | 514,528 |
| #144 | Polk County, IA | 503,175 |
| #145 | Lake County, IN | 500,379 |
| #146 | Washoe County, NV | 497,200 |
| #147 | Richmond County, NY | 494,956 |
Total Population in Polk County, Iowa
Polk County, Iowa has a total population of 503,175, which ranks #144 of 3,222 out of 3,222 counties nationwide. This is 99.8% below the national value of 330M.
Within Iowa, Polk County ranks #1 of 99 out of 99 counties. This places it in the 96th percentile nationally.
Total population count from the American Community Survey. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.
About this data
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.