Mineral County, Montana Demographics 2026

Population Overview

Mineral County is located in Montana with a total population of 4,796. It is the 37th most populous county out of 56 in Montana. The county encompasses 8 Census-designated places.

Age Demographics

The median age in Mineral County is 50.1 years. This is 25% higher than the state median of 40.2 years. 10.9% 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 Mineral County is $61,117. This is 13% lower than the state median of $69,922. It is also 22% lower than the national median of $78,538. The poverty rate stands at 17.8%. This is 48% higher than the state poverty rate of 12.0%. The unemployment rate is 4.0%. This is 5% higher than the state rate of 3.8%. The median home value is $313,600. Housing costs are 7% lower than the state median of $338,100. The home-value-to-income ratio is 5.1x. 80.3% of occupied housing units are owner-occupied. This homeownership rate is 16% higher than the state average of 69.4%.

Race & Ethnicity

Mineral County has a predominantly White (non-Hispanic) population, comprising 89.6% of all residents. Hispanic or Latino residents account for 3.5%. The Asian population (0.4%) is well below the state average of 0.8%.

Education

26.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 23% 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 93.3%.

Data Sources & Methodology

All figures for Mineral County come from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023), with comparisons drawn against Montana and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.