Cowlitz County's estimated 2026 population is 116,006 with a growth rate of 0.98% in the past year according to the most recent United States census data. Cowlitz County is the 12th largest county in Washington. The 2010 population was 102,358 and has seen a growth of 13.33% since that time.
Data after 2023 is projected based on recent change
Overall: 41.5 years
Female: 42.5 years
Male: 40.5 years
There are 87,129 adults, (22,230 of whom are seniors) in Cowlitz County.
Female: 56,283 (50.1%)
Male: 56,077 (49.9%)
The racial composition of Cowlitz County includes 83.17% 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 | 93,447 | 83.17% |
| Two or more races | 11,560 | 10.29% |
| Other race | 3,330 | 2.96% |
| Native American | 1,452 | 1.29% |
| Asian | 1,351 | 1.2% |
| Black or African American | 759 | 0.68% |
| Native Hawaiian or Pacific Islander | 461 | 0.41% |
Cowlitz County's average per capita income is $51,452. Household income levels show a median of $76,531. The poverty rate stands at 12.2%.
Name | Median | Mean |
|---|---|---|
| Married Families | $105,071 | - |
| Families | $90,861 | $110,788 |
| Households | $76,531 | $95,669 |
| Non Families | $44,970 | $60,191 |
Average Income
Median Household Income
Poverty Rate