Population
3,762
2025
+2.4% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
Sweet Grass County, MT: population growth, jobs and income
Sweet Grass County lost 56 residents between 2024 and 2025 (−1.5%).
Sweet Grass County had an estimated 3,762 residents in 2025, up 2.4% (88 more people) since 2020. That is slower than Montana as a whole (+5.3%), and the 30th fastest growth of 52 counties in Montana.
Data as of 2025 · updated
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In the Sweet Grass County report
One-time $99 PDF: everything on this page for Sweet Grass County, ranked against Montana and the U.S., plus these figures that are not on the free page:
- Median gross rent$1,149/mo2020–24
- Vacant homes, incl. seasonal and second homes18.3%2020–24
- New homes permitted, last 12 months12025-10/2026-09
- Rent growth, 5 yearsIn the report
- Permits in 5+ unit buildingsIn the report
- IRS income moving in (net AGI)In the report
- Neighbouring-county comparison tableIn the report
What's inside: 5 pages
- 1 Summary, headline numbers and ranks (free preview)
- 2 Ranks and the neighbouring-county table
- 3 Migration, with IRS mover and income flows
- 4 Rent, vacant homes, permits and employers
- 5 Every source and the methods
Headline numbers
Net domestic migration
−57
2025
−15.2 per 1,000 residents
+135 in total, 2021–2025
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. People moving in from other U.S. counties minus people moving out.
Unemployment rate
3.3%
2025
+0.6 pts since 2019
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics, 2025. Annual average unemployment rate.
New homes permitted
2
2025
0.5 per 1,000 residents
Small base: the change swings on a few homes or people, so we don't show it.
Source: U.S. Census Bureau, Building Permits Survey, 2025. Housing units authorized by building permits in the year.
Median household income
$77,000
2020–24
+43.1% since 2016–20
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–24. American Community Survey 5-year estimate.
Private-sector employment
1,361
2023
+8.2% since 2018
Source: U.S. Census Bureau, County Business Patterns, 2023. Paid employees of private employers in mid-March (County Business Patterns).
What the numbers say
Net domestic migration was negative in 2025: 57 more people moved out to other U.S. counties than moved in.
Private employers had 1,361 paid employees in mid-March 2023, +8.2% since 2018 (County Business Patterns).
Unemployment averaged 3.3% in 2025, 0.6 points higher than in 2019 (before the pandemic).
Builders were authorized to start 2 new homes in 2025, or 0.5 per 1,000 residents.
Median household income was $77,000 in the 2020–24 American Community Survey, +43.1% since 2016–20.
Across the 3,107 U.S. counties with a comparable estimate, its population growth ranks 1,154th.
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Sweet Grass County population by year
| Year | Population | Change |
|---|---|---|
| 2025 | 3,762 | −56 |
| 2024 | 3,818 | +30 |
| 2023 | 3,788 | +60 |
| 2022 | 3,728 | +21 |
| 2021 | 3,707 | +33 |
| 2020 | 3,674 | – |
Census Bureau population estimates, July 1 of each year.
What drove the change in Sweet Grass County
Sweet Grass County grew by 88 people since 2020; the largest part came from domestic migration (+135).
| Component | 2025 | 2020–25 | Share |
|---|---|---|---|
| Natural changebirths minus deaths | +2 | −63 | |
| International migrationfrom and to other countries | +0 | +19 | |
| Domestic migrationfrom and to other U.S. counties | −57 | +135 | |
| Census adjustmentbalancing residual | −1 | −3 | |
| Total change | −56 | +88 |
Census Bureau population estimates, components of change, each year July 1 to June 30. The components add up to the change in the estimate; the Census adjustment is the small balancing figure the Bureau publishes.
How it ranks
| Measure | In Montana | Among U.S. counties |
|---|---|---|
| Population growth | 30th of 52 | 1,154th of 3,107 |
| Net domestic migration per 1,000 residents | 49th of 52 | 2,993rd of 3,108 |
| Private-sector job growth | 19th of 52 | 859th of 3,092 |
| Median household income | 6th of 52 | 723rd of 3,107 |
| Lowest unemployment rate | 31st of 52 | 690th of 3,108 |
| New homes permitted per 1,000 residents | 23rd of 44 | 2,400th of 3,005 |
1st = highest (lowest for unemployment). Counties are ranked only against others with a figure for the same period.
Get the county report — $99
The County Growth and Demographics Report for Sweet Grass County, MT as a PDF, from federal data: population and migration, housing and rents, permits, private employers and jobs, unemployment, ranks in the state and the country, and neighbouring counties, with a source next to every number. Pay once, no subscription.
Add 2 neighbouring counties for $50: the Park County and Stillwater County reports too, $149 for all 3.
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Neighbouring counties
Over 2020–25, Sweet Grass County's population change (+2.4%) was ahead of 1 of its 4 neighbouring counties with a comparable figure and behind 3.
Only Stillwater County had a higher median household income (2020–24) among its 5 neighbouring counties; Sweet Grass County's was $77,000.
| County | Population2025 | Population change2020–25 | Net domestic migration per 1,000 residents2025 | Homes permitted per 1,000 residents2025 | Median household income2020–24 |
|---|---|---|---|---|---|
| Sweet Grass County, MT This county | 3,762 | +2.4% | −15.2 | 0.5 | $77,000 |
| Park County, MT | 18,214 | +5.7% | 3.1 | 0.0 | $70,047 |
| Stillwater County, MT | 9,445 | +5.0% | 2.3 | 0.0 | $84,732 |
| Wheatland County, MT | 2,100 | +1.2% | 18.6 | – | $49,489 |
| Golden Valley County, MT | 844 | – | – | – | $58,333 |
| Meagher County, MT | 2,137 | +11.2% | 20.6 | – | $71,932 |
Census Bureau population estimates and building permits, American Community Survey 5-year income. Rates per 1,000 residents. – means no figure, or a base too small for a change or rate (it would swing on a few people). A figure from another period shows its year and is left out of the comparison.
Questions
Is Sweet Grass County growing?
Yes. Its population grew 2.4% between 2020 and 2025, about 88 more people (Census Bureau population estimates). Montana as a whole changed +5.3% over the same years. That ranks 30th of 52 counties in Montana for population growth.
How many people moved to Sweet Grass County?
On net, none in 2025: about 57 more people moved out to other U.S. counties than moved in (Census Bureau net domestic migration estimate).
What is the unemployment rate in Sweet Grass County?
It averaged 3.3% in 2025 (BLS Local Area Unemployment Statistics, annual average).
What is the population of Sweet Grass County?
About 3,762 people, according to the U.S. Census Bureau's population estimate for July 1, 2025.
How many jobs are in Sweet Grass County?
Private employers there had 1,361 paid employees in mid-March 2023, +8.2% since 2018 (Census Bureau County Business Patterns; government jobs and the self-employed are not counted).
What Beacon CRE covers in Montana
Map, parcel and listing layers cover North and South Carolina only for now. This page and the other Montana county pages carry the public federal growth figures.
Sweet Grass County data alerts
Email me when Sweet Grass County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Sources and method
- U.S. Census Bureau, Population Estimates Program (Vintage 2025)
- U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics
- U.S. Census Bureau, Building Permits Survey
- U.S. Census Bureau, American Community Survey 5-year estimates
- U.S. Census Bureau, County Business Patterns
Each number shows its own period. Changes compare the latest period with five years earlier (or the earliest period available). Beacon CRE last refreshed these figures on 2026-11-05. Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how we compute every number. More on every layer: data sources and licences.
Jobs outside North and South Carolina use County Business Patterns (paid private-sector employees in mid-March); wages and government jobs are not included.