How many people live in Clackamas County, OR?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 425,900 people living in Clackamas County, OR. That makes Clackamas County the third-most populous county in Oregon. It is home to 10% of people living in the state.
426K
population of Clackamas County, OR (2024)
10%
County share of the Oregon population (2024)
About 425,900 people lived in Clackamas County, OR in 2024.
Population estimates, 2000–2024
What are Clackamas County, OR’s age demographics?
About 89,400 Clackamas County, OR residents are aged 65 and older in 2024. That represents 21% of its population. For comparison, the age group represents 19.9% of Oregon’s population and 18% in the US overall.
Another 86,100 Clackamas County residents, or 20.2% 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 Clackamas County, OR's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Clackamas County, OR’s racial and ethnic demographics?
Non-Hispanic white residents make up 77.3% of the Clackamas County, OR population, higher than the national share of 57.5%. Clackamas County, OR also has a larger share of people identifying as non-Hispanic two or more races (3.6%) than the US overall (2.5%).
In contrast, Clackamas County’s non-Hispanic Black or African American population accounts for 1.4%, below the 12.6% nationwide, and the Hispanic population makes up 10.7% 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.
Clackamas County, OR has a higher share of a non-Hispanic white population than Oregon as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Clackamas County, OR is Oregon City with about 38,300 residents in 2024.
Cities and towns in Clackamas County, OR ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Oregon City | 38,327 |
| 2. | Lake Oswego (pt.) | 37,521 |
| 3. | Happy Valley | 28,969 |
| 4. | West Linn | 26,597 |
| 5. | Wilsonville (pt.) | 24,531 |
| 6. | Milwaukie (pt.) | 21,620 |
| 7. | Canby | 18,027 |
| 8. | Sandy | 12,990 |
| 9. | Gladstone | 11,898 |
| 10. | Molalla | 10,134 |
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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.
