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.
Data after 2023 is projected based on recent change
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.
White
Two or more races
Other race
Native American
Native Hawaiian or Pacific Islander
Asian
Black or African American
Race | Population | Percentage (of total) |
|---|---|---|
| White | 9,051 | 83.3% |
| Two or more races | 931 | 8.57% |
| Other race | 730 | 6.72% |
| Native American | 93 | 0.86% |
| Native Hawaiian or Pacific Islander | 25 | 0.23% |
| Asian | 24 | 0.22% |
| Black or African American | 12 | 0.11% |
Married
Widowed
Divorced
Separated
Never Married
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%.
Name | Median | Mean |
|---|---|---|
| Married Families | $70,383 | - |
| Families | $64,943 | $78,690 |
| Households | $53,608 | $69,532 |
| Non Families | $30,903 | $41,262 |
Average Income
Median Household Income
Poverty Rate
