Sheridan County, Montana Demographics 2026

Population Overview

Sheridan County is located in Montana with a total population of 3,677. It is the 40th most populous county out of 56 in Montana. The county encompasses 7 Census-designated places.

Age Demographics

The median age in Sheridan County is 44.7 years. This is 11% higher than the state median of 40.2 years. 10.6% 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 Sheridan County is $63,654. This is 9% lower than the state median of $69,922. It is also 19% lower than the national median of $78,538. The poverty rate stands at 10.0%. This is 17% lower than the state poverty rate of 12.0%. The unemployment rate is 2.5%. This is 35% lower than the state rate of 3.8%. The median home value is $111,600. Housing costs are 67% lower than the state median of $338,100. With a home-value-to-income ratio of just 1.8x, Sheridan County is one of the most affordable housing markets in the area. 76.6% of occupied housing units are owner-occupied. This homeownership rate is 10% higher than the state average of 69.4%.

Race & Ethnicity

Sheridan County has a predominantly White (non-Hispanic) population, comprising 89.2% of all residents. Hispanic or Latino residents account for 4.5%.

Education

24.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 29% 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 91.5%.

Data Sources & Methodology

All figures for Sheridan 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.