Total Population in Washington County, OR
ACS 2024 5-Year Estimates
603,947
Rank #114/3,222 · #2 in OR
96th
Washington 603,947
OR 4,254,293 -85.8%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Washington County's total population of 603,947 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 Washington County for total population.
Nearby Rankings
Full ranking →| #111 | Western Connecticut Planning Region, CT | 627,071 |
| #112 | Johnson County, KS | 620,631 |
| #113 | Pasco County, FL | 611,444 |
| #114 | Washington County, OR | 603,947 |
| #115 | Anne Arundel County, MD | 598,166 |
| #116 | Douglas County, NE | 590,736 |
| #117 | Bristol County, MA | 582,270 |
About Total Population
Washington County, Oregon has a total population of 603,947, ranking #114 of 3,222 counties nationwide — 99.8% below the national value of 330M. Within Oregon, it ranks #2 of 36. This places it in the 96th 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.