Total Population in Marion County, OR
ACS 2024 5-Year Estimates
How Marion County Compares
National Distribution
Where Marion County falls among all 3,222 U.S. counties for total population.
■ Marion County: 349,244
Ranking Context
| Rank | County | Value |
|---|---|---|
| #211 | Westmoreland County, PA | 352,500 |
| #212 | Weld County, CO | 350,396 |
| #213 | Somerset County, NJ | 349,846 |
| #214 | Marion County, OR | 349,244 |
| #215 | Spartanburg County, SC | 347,852 |
| #216 | Rockland County, NY | 341,883 |
| #217 | Cumberland County, NC | 338,545 |
Total Population in Marion County, Oregon
Marion County, Oregon has a total population of 349,244, which ranks #214 of 3,222 out of 3,222 counties nationwide. This is 99.9% below the national value of 330M.
Within Oregon, Marion County ranks #5 of 36 out of 36 counties. This places it in the 93th 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.