Rocky Boy's Agency, Montana Demographics & Population 2026

A note before these figures: with a population of 120, Rocky Boy's Agency's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Rocky Boy's Agency is a small community located in Montana, within Hill County. The total population is 120. It ranks as the 313th most populous out of 475 Census-designated places in Montana.

Age Demographics

The median age in Rocky Boy's Agency is 53.7 years. This is 33% higher than the state median of 40.4 years.

Economy, Income & Housing

The median household income in Rocky Boy's Agency is $58,708. This is 19% lower than the state median of $72,509. It is also 27% lower than the national median of $80,734. The poverty rate stands at 24.2%. This is 110% higher than the state poverty rate of 11.5%. 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 5.8%. This is 59% higher than the state rate of 3.6%. 20.4% of occupied housing units are owner-occupied. This homeownership rate is 71% lower than the state average of 69.2%.

Race & Ethnicity

Rocky Boy's Agency is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. Asian residents account for 9.2%. The White (non-Hispanic) population (15.8%) is well below the state average of 83.6%. The Asian population is significantly higher than the state average (9.2% vs 0.8%).

Education

15.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 55% lower than the state rate of 35.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.8%.

Data Sources & Methodology

All demographic data for Rocky Boy's Agency, Montana is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Montana state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 475 Census-designated places in Montana. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.