Big Arm CDP, Montana Demographics & Population 2026

Population Overview

Big Arm CDP is a small community located in Montana. The total population is 142. It ranks as the 284th most populous out of 470 cities and towns in Montana.

Age Demographics

The median age in Big Arm CDP is 31.5 years. This is 22% lower than the state median of 40.2 years. With 31.0% of the population under 18, Big Arm CDP has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The poverty rate stands at 55.6%. This is 362% higher than the state poverty rate of 12.0%. 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 0.0%. This is 100% lower than the state rate of 3.8%. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 44% higher than the state average of 69.4%.

Race & Ethnicity

Big Arm CDP is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. The White (non-Hispanic) population (39.4%) is well below the state average of 84.1%.

Education

11.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 68% 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 74.5%.

Data Sources & Methodology

All demographic data for Big Arm CDP, Montana is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Montana state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 470 Census-designated places in Montana. For official data, visit data.census.gov.