Sweet Grass County, Montana Demographics 2026

Population Overview

Sweet Grass County is located in Montana with a total population of 3,713. It is the 39th most populous county out of 56 in Montana.

Age Demographics

The median age in Sweet Grass County is 44.0 years. This is 9% higher than the state median of 40.2 years. 11.4% 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 Sweet Grass County is $69,426. This is about average than the state median of $69,922. Compared to the national median of $78,538, household income here is 12% lower. The poverty rate stands at 7.8%. This is 35% lower than the state poverty rate of 12.0%. The unemployment rate is 2.2%. This is 42% lower than the state rate of 3.8%. The median home value is $295,500. Housing costs are 13% lower than the state median of $338,100. The home-value-to-income ratio is 4.3x. 76.1% of occupied housing units are owner-occupied. This homeownership rate is 10% higher than the state average of 69.4%.

Race & Ethnicity

Sweet Grass County has a predominantly White (non-Hispanic) population, comprising 90.6% of all residents. Hispanic or Latino residents account for 1.8%. The Black or African American population is significantly higher than the state average (1.4% vs 0.5%). The Hispanic or Latino population (1.8%) is well below the state average of 4.4%.

Education

23.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 33% 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 96.4%.