Custer County, Montana Demographics 2026

Population Overview

Custer County is located in Montana with a total population of 11,938. It is the 17th most populous county out of 56 in Montana.

Age Demographics

The median age in Custer County is 42.6 years. This is 6% higher than the state median of 40.2 years.

Economy, Income & Housing

The median household income in Custer County is $63,585. This is 9% lower than the state median of $69,922. Compared to the national median of $78,538, household income here is 19% lower. The poverty rate stands at 11.7%. This is 3% lower than the state poverty rate of 12.0%. The unemployment rate is 2.7%. This is 28% lower than the state rate of 3.8%. The median home value is $204,200. Housing costs are 40% lower than the state median of $338,100. The home-value-to-income ratio is 3.2x. 68.5% of occupied housing units are owner-occupied. This homeownership rate is 1% lower than the state average of 69.4%.

Race & Ethnicity

Custer County has a predominantly White (non-Hispanic) population, comprising 89.5% of all residents. Hispanic or Latino residents account for 3.3%. The Asian population (0.4%) is well below the state average of 0.8%.

Education

29.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 14% lower than the state rate of 34.5%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 94.7%.