Washington County's estimated 2025 population is 11,570 with a growth rate of 0.27% 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 13.69% 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 (83.3%)
Two or more races (8.57%)
Other race (6.72%)
Native American (0.86%)
Native Hawaiian or Pacific Islander (0.23%)
Asian (0.22%)
Black or African American (0.11%)
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
