Idaho County, Idaho Demographics 2026

Population Overview

Idaho County is located in Idaho with a total population of 17,120. It is the 20th most populous county out of 44 in Idaho.

Age Demographics

The median age in Idaho County is 49.6 years. This is 34% higher than the state median of 37.1 years. 11.1% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Idaho County is $60,975. This is 18% lower than the state median of $74,636. Compared to the national median of $78,538, household income here is 22% lower. The poverty rate stands at 10.8%. This is 2% higher than the state poverty rate of 10.6%. The unemployment rate is 3.7%. The median home value is $284,600. Housing costs are 24% lower than the state median of $376,000. The home-value-to-income ratio is 4.7x. 80.1% of occupied housing units are owner-occupied. This homeownership rate is 11% higher than the state average of 72.4%.

Race & Ethnicity

Idaho County has a predominantly White (non-Hispanic) population, comprising 89.9% of all residents. Hispanic or Latino residents account for 3.8%. The Black or African American population (0.1%) is well below the state average of 0.7%. The Hispanic or Latino population (3.8%) is well below the state average of 13.3%. The Asian population (0.5%) is well below the state average of 1.3%.

Education

22.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 29% 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 91.8%.