Washington County, Idaho Demographics 2026

Population Overview

Washington County is located in Idaho with a total population of 10,866. It is the 29th most populous county out of 44 in Idaho.

Age Demographics

The median age in Washington County is 44.6 years. This is 20% higher than the state median of 37.1 years.

Economy, Income & Housing

The median household income in Washington County is $53,608. This is 28% lower than the state median of $74,636. Compared to the national median of $78,538, household income here is 32% lower. The poverty rate stands at 15.3%. This is 44% higher than the state poverty rate of 10.6%. The unemployment rate is 4.7%. This is 27% higher than the state rate of 3.7%. The median home value is $250,300. Housing costs are 33% lower than the state median of $376,000. The home-value-to-income ratio is 4.7x. 73.3% of occupied housing units are owner-occupied. This homeownership rate is 1% higher than the state average of 72.4%.

Race & Ethnicity

The largest racial or ethnic group in Washington County is White (non-Hispanic), making up 78.5% of the population. Hispanic or Latino residents account for 16.0%. The Black or African American population (0.1%) is well below the state average of 0.7%. The Asian population (0.2%) is well below the state average of 1.3%.

Education

19.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 39% lower than the state rate of 31.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 88.7%.