Total Population in Marion County, IA
ACS 2024 5-Year Estimates
33,642
Rank #1,378/3,222 · #21 in IA
57th
Marion 33,642
IA 3,210,507 -99.0%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Marion County's total population of 33,642 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to Marion County for total population.
Nearby Rankings
Full ranking →| #1,375 | Pulaski County, VA | 33,687 |
| #1,376 | Caroline County, MD | 33,669 |
| #1,377 | Daviess County, IN | 33,658 |
| #1,378 | Marion County, IA | 33,642 |
| #1,379 | Halifax County, VA | 33,639 |
| #1,380 | Lee County, GA | 33,626 |
| #1,381 | Scotland County, NC | 33,590 |
About Total Population
Marion County, Iowa has a total population of 33,642, ranking #1,378 of 3,222 counties nationwide — 100.0% below the national value of 330M. Within Iowa, it ranks #21 of 99. This places it in the 57th percentile nationally.
Total population count from the American Community Survey. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.