Garrison, Montana Demographics & Population 2026

A note before these figures: with a population of 106, Garrison'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

Garrison is a small community located in Montana, within Powell County. The total population is 106. It ranks as the 324th most populous out of 475 Census-designated places in Montana.

Age Demographics

The median age in Garrison is 38.3 years. This is 5% lower than the state median of 40.4 years. With 33.0% of the population under 18, Garrison has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Garrison is $93,625. This is 29% higher than the state median of $72,509. It is also 16% higher than the national median of $80,734. The poverty rate stands at 7.5%. This is 34% lower than the state poverty rate of 11.5%. The survey records no unemployed residents in Garrison, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $583,300. Housing costs are 55% higher than the state median of $375,800. The home-value-to-income ratio of 6.2x suggests that housing affordability is a significant concern for many residents. 93.9% of occupied housing units are owner-occupied. This homeownership rate is 36% higher than the state average of 69.2%.

Race & Ethnicity

The largest racial or ethnic group in Garrison is White (non-Hispanic), making up 71.7% of the population.

Education

6.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 81% 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 78.3%.

Data Sources & Methodology

All demographic data for Garrison, 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.