Sweet Grass County, Montana
Located in Montana, Sweet Grass County has a population of 3,720 residents and a median age of 47.0 years, making it the #2,984 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 7.9%. The median home value is $330,100, and the median household income is $77,000, which is 2% above the national median.
Demographics
Sweet Grass County has a population of 3,720, making it the #2,984 most populous county in the US. The median age is 47.0 years, which is 20.8% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Sweet Grass County is $77,000, ranking #727 out of 3,222 counties — 2.5% above the national median. The poverty rate is 7.9% and unemployment stands at 1.8%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Sweet Grass County is $330,100 (+17.1% vs national). Renters pay a median of $1,149/mo and the homeownership rate is 79.7%.
Median Home Value Trend
Rankings →Household Type
Education
In Sweet Grass County, 24.4% of adults age 25+ hold a bachelor's degree or higher, which is 27.7% below the national average, ranking #1,316 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Sweet Grass County is 80.3 years. 13.4% of adults report poor or fair health and 10.0% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
13.4% of adults in Sweet Grass County smoke , 32.1% are obese , and 25.8% report excessive drinking.
Adult Smoking Trend
Safety
. Motor vehicle deaths occur at a rate of 39.2 per 100,000.
Families & Children
11.4% of children in Sweet Grass County live in poverty .
Child Poverty Trend
Civic & Transportation
Voter turnout in Sweet Grass County is 84.3%. The mean commute time is 26.4 min, which is 4.5% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Sweet Grass County voted Republican with a margin of 53.1%. The vote was 22% Dem / 75.1% Rep. Compared to 2020, the margin shifted 0.3 toward Republicans .
Vote Share Over Time
About Sweet Grass County, Montana
Sweet Grass County, Montana has a total population of 3,720, making it the 2,984th most populous county in the United States. The median age in Sweet Grass County is 47.0 years, which is 20.8% above the national median of 38.9 years.
The median household income in Sweet Grass County is $77,000, which ranks #727 of 3,222 counties nationwide. This is 2.5% above the national median of $75,149. The poverty rate is 7.9%, lower than the national rate of 12.6%. The unemployment rate stands at 1.8%.
The median home value in Sweet Grass County is $330,100, 17.1% above the national median. Renters in Sweet Grass County pay a median gross rent of $1,149 per month. The homeownership rate is 79.7%, compared to the national rate of 64.4%.
In Sweet Grass County, 24.4% of residents aged 25 and older hold a bachelor's degree or higher, 27.7% below the national average of 33.7%. Health insurance coverage stands at 89.8% of the population. The average commute time for workers is 26.4 min.
Sweet Grass County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 90.8% of the population, followed by Two or More Races (4.4%) and American Indian (non-Hispanic) (1.6%).
All data for Sweet Grass County, Montana comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.