Washington County Flag

Washington County

State:
Idaho
County Seat:
Weiser

Washington County's estimated 2025 population is 11,981 with a growth rate of 2.38% in the past year according to the most recent United States census data. Washington County is the 29th largest county in Idaho. The 2010 population was 10,177 and has seen a growth of 17.73% since that time.

11,981
Total Population
8
Population Density (miĀ²)
29
Population Rank (State)
278 2.38%
Annual Population Growth

Washington County Population

Washington County Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Washington County includes 83.3% White, 6.72% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander, Asian, Black or African American and multiracial populations.

Population by Race

White

Two or more races

Other race

Native American

Native Hawaiian or Pacific Islander

Asian

Black or African American

Race
Population
Percentage (of total)
White9,05183.3%
Two or more races9318.57%
Other race7306.72%
Native American930.86%
Native Hawaiian or Pacific Islander250.23%
Asian240.22%
Black or African American120.11%

Washington County Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Washington County's average per capita income is $36,784. Household income levels show a median of $53,608. The poverty rate stands at 15.35%.

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$70,383-
Families$64,943$78,690
Households$53,608$69,532
Non Families$30,903$41,262

$36,784

Average Income

$53,608

Median Household Income

15.35%

Poverty Rate