Thurston County's 2026 population is estimated at 309,698, reflecting a 1.11% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Thurston County is the 6th largest county in Washington. The 2010 population was 253,011 and has grown 22.4% since 2010.
Data after 2023 is projected based on recent change
Overall: 40 years
Female: 41.2 years
Male: 38.6 years
There are 236,687 adults, (56,072 of whom are seniors) in Thurston County.
Female: 152,090 (50.9%)
Male: 146,977 (49.1%)
The racial composition of Thurston County includes 72.1% White, 6.13% Asian, 3.33% Black or African American, 3.32% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 215,637 | 72.1% |
| Two or more races | 38,751 | 12.96% |
| Asian | 18,347 | 6.13% |
| Black or African American | 9,947 | 3.33% |
| Other race | 9,925 | 3.32% |
| Native American | 3,375 | 1.13% |
| Native Hawaiian or Pacific Islander | 3,085 | 1.03% |
Thurston County 's average per capita income is $60,722. Household income levels show a median of $96,563. The poverty rate stands at 9.55%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $127,162 | $146,666 |
| Families | $114,714 | $131,859 |
| Households | $96,563 | $114,140 |
| Non Families | $58,298 | $73,253 |
Average Income
Median Household Income
Poverty Rate