In 2023, Big Arm, MT had a population of 142 people with a median age of 31.5 and a median household income of N/A. Between 2022 and 2023 the population of Big Arm, MT declined from 168 to 142, a −15.5% decrease and its median household income N/A from N/A to N/A, a N/A% N/A.
The 5 largest ethnic groups in Big Arm, MT are American Indian & Alaska Native (Non-Hispanic) (60.6%), White (Non-Hispanic) (39.4%), White (Hispanic) (0%), Black or African American (Non-Hispanic) (0%), and Black or African American (Hispanic) (0%).
None of the households in Big Arm, MT reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
100% of the residents in Big Arm, MT are U.S. citizens.
Most people in Big Arm, MT drove alone to work, and the average commute time was 26.6 minutes. The average car ownership in Big Arm, MT was 3 cars per household.