Columbia County's 2026 population is estimated at 54,217, reflecting a 0.23% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Columbia County is the 17th largest county in Oregon. The 2010 population was 49,353 and has grown 9.86% since 2010.
Overall: 43.3 years
Female: 44.3 years
Male: 42.6 years
There are 42,626 adults, (10,754 of whom are seniors) in Columbia County.
Female: 26,201 (49%)
Male: 27,292 (51%)
The racial composition of Columbia County includes 85.45% White, and smaller percentages for other race, Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 45,709 | 85.45% |
| Two or more races | 5,818 | 10.88% |
| Other race | 503 | 0.94% |
| Native American | 481 | 0.9% |
| Asian | 423 | 0.79% |
| Black or African American | 332 | 0.62% |
| Native Hawaiian or Pacific Islander | 227 | 0.42% |
Columbia County 's average per capita income is $52,628. Household income levels show a median of $87,458. The poverty rate stands at 8.87%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $110,594 | - |
| Families | $99,592 | $112,963 |
| Households | $87,458 | $100,740 |
| Non Families | $51,027 | $65,253 |
Average Income
Median Household Income
Poverty Rate