Columbia County's estimated 2026 population is 4,236 with a growth rate of 2.29% in the past year according to the most recent United States census data. Columbia County is the 38th largest county in Washington. The 2010 population was 4,094 and has seen a growth of 3.47% since that time.
Data after 2023 is projected based on recent change
Overall: 49.6 years
Female: 52.4 years
Male: 44.9 years
There are 3,291 adults, (1,177 of whom are seniors) in Columbia County.
Female: 2,016 (50.2%)
Male: 1,998 (49.8%)
The racial composition of Columbia County includes 83.13% White, 3.81% other race, and smaller percentages for Asian, Black or African American, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 3,337 | 83.13% |
| Two or more races | 414 | 10.31% |
| Other race | 153 | 3.81% |
| Asian | 75 | 1.87% |
| Black or African American | 22 | 0.55% |
| Native American | 13 | 0.32% |
Columbia County's average per capita income is $53,611. Household income levels show a median of $71,810. The poverty rate stands at 9.31%.
Name | Median | Mean |
|---|---|---|
| Married Families | $108,608 | - |
| Families | $96,932 | $110,258 |
| Households | $71,810 | $88,239 |
| Non Families | $40,192 | $46,689 |
Average Income
Median Household Income
Poverty Rate