How many people live in Multnomah County, OR?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 795,900 people living in Multnomah County, OR. That makes Multnomah County the most populous county in Oregon. It is home to 18.6% of people living in the state.
796K
population of Multnomah County, OR (2024)
18.6%
County share of the Oregon population (2024)
About 795,900 people lived in Multnomah County, OR in 2024.
Population estimates, 2000–2024
What are Multnomah County, OR’s age demographics?
About 122,900 Multnomah County, OR residents are aged 65 and older in 2024. That represents 15.4% of its population. For comparison, the age group represents 19.9% of Oregon’s population and 18% in the US overall.
Another 135,300 Multnomah County residents, or 17% of the population, were children under 18. For comparison, the age group represents 19.3% of Oregon’s population and 21.6% in the US overall.
A higher share of Multnomah County, OR's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Multnomah County, OR’s racial and ethnic demographics?
Non-Hispanic white residents make up 65.6% of the Multnomah County, OR population, higher than the national share of 57.5%. Multnomah County, OR also has a larger share of people identifying as non-Hispanic Asian (8.4%) than the US overall (6.5%).
In contrast, Multnomah County’s non-Hispanic Black or African American population accounts for 5.9%, below the 12.6% nationwide, and the Hispanic population makes up 14.4% of the county, compared with 20% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Multnomah County, OR has a higher share of a non-Hispanic Black or African American population than Oregon as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Multnomah County, OR is Portland with about 633,300 residents in 2024.
Cities and towns in Multnomah County, OR ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Portland (pt.) | 633,255 |
| 2. | Gresham | 111,507 |
| 3. | Troutdale | 15,749 |
| 4. | Fairview | 10,796 |
| 5. | Wood Village | 4,722 |
| 6. | Lake Oswego (pt.) | 2,506 |
| 7. | Maywood Park | 810 |
| 8. | Milwaukie (pt.) | |
| 9. | Balance of Multnomah County | 16,552 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
