Sweet Grass, Montana Demographics & Population 2026

A note before these figures: with a population of 70, Sweet Grass'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

Sweet Grass is a small community located in Montana, within Toole County. The total population is 70. It ranks as the 361st most populous out of 475 Census-designated places in Montana.

Age Demographics

The median age in Sweet Grass is 67.1 years. This is 66% higher than the state median of 40.4 years. Only 14.3% of residents are under 18, indicating fewer families with children. 27.1% 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 Sweet Grass is $82,000. This is 13% higher than the state median of $72,509. It is also 2% higher than the national median of $80,734. The ACS records no residents below the poverty line in Sweet Grass. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The survey records no unemployed residents in Sweet Grass, which reflects the size of the sample rather than a labor market without joblessness. 87.5% of occupied housing units are owner-occupied. This homeownership rate is 26% higher than the state average of 69.2%.

Race & Ethnicity

The largest racial or ethnic group in Sweet Grass is White (non-Hispanic), making up 84.3% of the population. Hispanic or Latino residents account for 15.7%. The Hispanic or Latino population is significantly higher than the state average (15.7% vs 4.6%).

Education

5.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 86% 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 90.0%.

Data Sources & Methodology

All demographic data for Sweet Grass, 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.