Thurston County Flag

Thurston County

State:
Washington
County Seat:
Olympia

Thurston County's estimated 2025 population is 299,731 with a growth rate of 0.12% in the past year according to the most recent United States census data. Thurston County is the 6th largest county in Washington. The 2010 population was 253,011 and has seen a growth of 18.47% since that time.

299,731
Total Population
415
Population Density (mi²)
6
Population Rank (State)
364 0.12%
Annual Population Growth

Thurston County Population

Thurston County Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Thurston County includes 74.08% White, 5.8% Asian, 3.32% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White219,73874.08%
Two or more races35,72212.04%
Asian17,1985.8%
Black or African American9,8633.32%
Other race7,6032.56%
Native American3,4441.16%
Native Hawaiian or Pacific Islander3,0721.04%

Thurston County Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Thurston County's average per capita income is $58,054. Household income levels show a median of $93,985. The poverty rate stands at 9.67%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$122,749$142,768
Families$111,908$128,742
Households$93,985$111,383
Non Families$57,214$71,574

$58,054

Average Income

$93,985

Median Household Income

9.67%

Poverty Rate