Boundary County, Idaho Demographics 2026

Population Overview

Boundary County is located in Idaho with a total population of 12,695. It is the 25th most populous county out of 44 in Idaho.

Age Demographics

The median age in Boundary County is 42.8 years. This is 15% higher than the state median of 37.1 years.

Economy, Income & Housing

The median household income in Boundary County is $62,438. This is 16% lower than the state median of $74,636. Compared to the national median of $78,538, household income here is 20% lower. The poverty rate stands at 17.2%. This is 61% higher than the state poverty rate of 10.6%. The unemployment rate is 3.3%. This is 9% lower than the state rate of 3.7%. The median home value is $344,100. Housing costs are 8% lower than the state median of $376,000. The home-value-to-income ratio is 5.5x. 78.0% of occupied housing units are owner-occupied. This homeownership rate is 8% higher than the state average of 72.4%.

Race & Ethnicity

Boundary County has a predominantly White (non-Hispanic) population, comprising 87.0% of all residents. Hispanic or Latino residents account for 5.6%. The Hispanic or Latino population (5.6%) is well below the state average of 13.3%.

Education

19.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 37% 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 87.2%.