Lemhi County, Idaho Demographics 2026

Population Overview

Lemhi County is located in Idaho with a total population of 8,166. It is the 32nd most populous county out of 44 in Idaho.

Age Demographics

The median age in Lemhi County is 53.1 years. This is 43% higher than the state median of 37.1 years. 12.5% 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 Lemhi County is $52,057. This is 30% lower than the state median of $74,636. Compared to the national median of $78,538, household income here is 34% lower. The poverty rate stands at 11.8%. This is 11% higher than the state poverty rate of 10.6%. The unemployment rate is 3.4%. This is 9% lower than the state rate of 3.7%. The median home value is $282,100. Housing costs are 25% lower than the state median of $376,000. The home-value-to-income ratio is 5.4x. 81.3% of occupied housing units are owner-occupied. This homeownership rate is 12% higher than the state average of 72.4%.

Race & Ethnicity

Lemhi County has a predominantly White (non-Hispanic) population, comprising 91.7% of all residents. Hispanic or Latino residents account for 1.8%. The Black or African American population (0.0%) is well below the state average of 0.7%. The Hispanic or Latino population (1.8%) is well below the state average of 13.3%. The Asian population (0.1%) is well below the state average of 1.3%.

Education

22.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 26% 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 92.7%.