Cassia County, Idaho Demographics 2026

Population Overview

Cassia County is located in Idaho with a total population of 25,165. It is the 15th most populous county out of 44 in Idaho.

Age Demographics

The median age in Cassia County is 33.1 years. This is 11% lower than the state median of 37.1 years. With 31.2% of the population under 18, Cassia County has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Cassia County is $67,042. This is 10% lower than the state median of $74,636. Compared to the national median of $78,538, household income here is 15% lower. The poverty rate stands at 10.3%. This is 3% lower than the state poverty rate of 10.6%. The unemployment rate is 2.5%. This is 32% lower than the state rate of 3.7%. The median home value is $257,300. Housing costs are 32% lower than the state median of $376,000. The home-value-to-income ratio is 3.8x. 70.0% of occupied housing units are owner-occupied. This homeownership rate is 3% lower than the state average of 72.4%.

Race & Ethnicity

The largest racial or ethnic group in Cassia County is White (non-Hispanic), making up 65.3% of the population. Hispanic or Latino residents account for 29.4%. The Black or African American population (0.1%) is well below the state average of 0.7%. The Hispanic or Latino population is significantly higher than the state average (29.4% vs 13.3%). The Asian population (0.3%) is well below the state average of 1.3%.

Education

20.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 33% 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 85.4%.