Madison County, Idaho Demographics 2026

Population Overview

Madison County is located in Idaho with a total population of 53,578. It is the 7th most populous county out of 44 in Idaho.

Age Demographics

The median age in Madison County is 21.4 years. This is 42% lower than the state median of 37.1 years.

Economy, Income & Housing

The median household income in Madison County is $58,259. This is 22% lower than the state median of $74,636. Compared to the national median of $78,538, household income here is 26% lower. The poverty rate stands at 26.8%. This is 152% higher than the state poverty rate of 10.6%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 8.8%. This is 138% higher than the state rate of 3.7%. The median home value is $365,000. Housing costs are 3% lower than the state median of $376,000. The home-value-to-income ratio of 6.3x suggests that housing affordability is a significant concern for many residents. 40.2% of occupied housing units are owner-occupied. This homeownership rate is 44% lower than the state average of 72.4%.

Race & Ethnicity

The largest racial or ethnic group in Madison County is White (non-Hispanic), making up 84.5% of the population. Hispanic or Latino residents account for 9.7%.

Education

40.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 29% higher 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 97.0%.