Median Age in Marion County, OR
ACS 2024 5-Year Estimates
37.5 years
Rank #2,679/3,222 · #32 in OR
17th
Marion 37.5 years
OR 40.4 years -7.2%
US 38.9 years -3.6%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Marion County's median age of 37.5 years compares to all 3,222 U.S. counties. Values range from 21.4 years to 86.2 years.
Distribution of Median Age Across All Counties
Ranking Context
Counties ranked closest to Marion County for median age.
Nearby Rankings
Full ranking →| #2,676 | Lincoln County, MO | 37.5 years |
| #2,677 | Fallon County, MT | 37.5 years |
| #2,678 | Guilford County, NC | 37.5 years |
| #2,679 | Marion County, OR | 37.5 years |
| #2,680 | Mellette County, SD | 37.5 years |
| #2,681 | Rockwall County, TX | 37.5 years |
| #2,682 | Smith County, TX | 37.5 years |
About Median Age
Marion County, Oregon has a median age of 37.5 years, ranking #2,679 of 3,222 counties nationwide — 3.6% below the national value of 38.9 years. Within Oregon, it ranks #32 of 36. This places it in the 17th percentile nationally.
The median age of the total population. 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.