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COUNTY

Sweet Grass County

Montana · 3,762 residents (2025 est.) · 1,855.536 sq mi
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The short version

Sweet Grass County has roughly average household income, with a median household income of $77,000. Population has held roughly steady since 2000. Median home value has roughly tripled since 2000, reaching $330,100. With a median age of 47.0, the population is older than the US median of 38.9. It sits in the top 10% of US counties for household income.

At a glance
Lower income
below the US median
US median: $82,259
Older
median age 47.0
US median: 38.9
Less educated
24% hold a bachelor's degree
US average: 36%
Less affordable
home values up 68%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
3,720
+3%since 2000
from 3,609 in 2000
1990 – 2025
Population density
2 / sq mi
+1%since 2009
from 2 / sq mi in 2009
US average: 281
Median age
47.0
+14%since 2000
from 41.2 in 2000
US average: 38.9

PEP 2025 EST:3,762 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
3K3K3K4K4K1990201020202024Sweet Grass County
20244K
1990201020202024
Age distribution, 2024
Under 54.7%(174)
US avg: 5.6%
5 to 95.4%(201)
US avg: 6%
10 to 145.1%(191)
US avg: 6.4%
15 to 197.9%(293)
US avg: 6.6%
20 to 244.3%(161)
US avg: 6.5%
25 to 348.7%(325)
US avg: 13.7%
35 to 4411.5%(428)
US avg: 13.2%
45 to 5411.6%(431)
US avg: 12.2%
55 to 6415%(557)
US avg: 12.7%
65 to 7414%(520)
US avg: 10.2%
75 to 847.2%(269)
US avg: 5.1%
85 and over4.6%(170)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$77,000
+30%inflation adjusted, since 2000
from $32,422 in 2000
US average: $82,259
1990 – 2024
Per capita income
$44,275
+148%since 2000
from $17,880 in 2000
US average: $44,673
Households earning $100K+
51.0%
+26.6 ptssince 2009
from 24.4% in 2009
US average: 53.3%
Poverty rate
7.9%
−3.5 ptssince 2000
from 11.4% in 2000
US average: 12.5%
Income inequality (Gini)
0.457
+10%since 2010
from 0.415 in 2010
US average: 0.476
Workforce by industry, 2024
Agriculture, forestry, fishing19.7%
US avg: 1.6%
Wholesale trade13.7%
US avg: 6.9%
Construction12.3%
US avg: 1.2%
Information9.1%
US avg: 10.8%
Retail trade7.6%
US avg: 9.9%
Manufacturing7.4%
US avg: 0.4%
Finance & insurance6.2%
US avg: 5.9%
Professional, scientific, technical5.3%
US avg: 5.1%
Other services4.5%
US avg: 6.7%
Public administration2.1%
US avg: 4.8%
Arts, entertainment, food1.6%
US avg: 1.9%
Education & health services0.9%
US avg: 0.9%
Transportation & warehousing0.8%
US avg: 2.2%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$330,100
+68%inflation adjusted, since 2000
from $107,900 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$1,149
+47%inflation adjusted, since 2000
from $429 in 2000
US average: $1,442
Owner-occupied
79.7%
+5.7 ptssince 2000
from 74.1% in 2000
20.3% rent
Vacancy rate
18.3%
−15.5 ptssince 2009
from 33.9% in 2009
US average: 10.0%
Owner cost-burdened
17.9%
−5.0 ptssince 2009
from 22.9% in 2009
US average: 22.9%
Renter cost-burdened
29.8%
+11.3 ptssince 2009
from 18.5% in 2009
US average: 47.4%
Afford Score
4.3
+1%since 2009
from 4.3 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
Gentrification Score
52
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
RELATED:See current rent listings in Sweet Grass County on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic96.1%(3,467)
Black0.1%(2)
Hispanic / Latino1.5%(54)
Asian0.3%(12)
Other0%
2024
White, non-Hispanic90.8%(3,376)
Black1%(39)
Hispanic / Latino1.2%(45)
Asian0.2%(7)
Other6.8%(253)
Diversity Score
21
+53%since 2009
from 14 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican1.1%(42)
Spaniard0.1%(3)
Asian origin
Filipino0.2%(6)
Ancestry
German24.7%(919)
English16.2%(604)
Norwegian13.9%(516)
Irish9.6%(356)
Scottish3.1%(117)
American2.7%(99)
Dutch1.9%(69)
French1.7%(63)
Swiss1.5%(56)
Czech1.2%(45)
Italian1.1%(42)
Polish1%(38)
+ 17 more ancestry groups with data
Swedish0.8%(31)
Welsh0.5%(19)
Croatian0.4%(14)
Slovak0.3%(13)
Danish0.3%(12)
Hungarian0.3%(12)
Canadian0.2%(7)
Belgian0.2%(6)
British0.1%(5)
Russian0.1%(5)
Finnish0.1%(3)
Austrian0.1%(2)
Portuguese0.1%(2)
Slovene0.1%(2)
RANKED:Largest German population · Largest English population · Largest Norwegian population · Largest Irish population · Largest Scottish population
Section 05

Education

Bachelor's degree or higher
24.4%
+0.8 ptssince 2000
from 23.6% in 2000
US average: 35.6%
High school or higher
97.1%
+8.2 ptssince 2000
from 88.9% in 2000
US average: 89.6%
Graduate degree
6.6%
+1.4 ptssince 2000
from 5.2% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
24.5 min
+44%since 2000
from 17.1 min in 2000
US average: 26.5
Drive alone to work
66.9%
+16.6 ptssince 2009
from 50.3% in 2009
US average: 68.9%
Carpooled to work
9.1%
−2.3 ptssince 2009
from 11.4% in 2009
US average: 8.5%
Public transit
1.8%
−6.1 ptssince 2009
from 7.9% in 2009
US average: 3.2%
Worked from home
16.0%
−4.2 ptssince 2009
from 20.2% in 2009
US average: 15.0%
Walked to work
4.4%
−4.7 ptssince 2009
from 9.1% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
2.5%
+2.2 ptssince 2009
from 0.3% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
1.8%
−4.7 ptssince 2011
from 6.4% in 2011
US average: 5.2%
Labor force participation
64.5%
−1.1 ptssince 2011
from 65.7% in 2011
US average: 63.5%
Self-employed
13.0%
+1.1 ptssince 2009
from 11.9% in 2009
US average: 13.1%
Management & professional
34.3%
−29.2 ptssince 2009
from 63.5% in 2009
US average: 42.5%
Section 08

People & community

Male
50.3%
−2.0 ptssince 2009
from 52.2% in 2009
Female
49.7%
+2.0 ptssince 2009
from 47.8% in 2009
Foreign born
1.3%
−0.2 ptssince 2009
from 1.5% in 2009
US average: 14.1%
Veterans
11.2%
−40.1 ptssince 2009
from 51.4% in 2009
US average: 6.2%
With a disability
17.3%
+5.0 ptssince 2012
from 12.3% in 2012
US average: 13.3%
Uninsured
10.2%
−72.0 ptssince 2013
from 82.2% in 2013
US average: 8.4%
Broadband at home
91.6%
+21.1 ptssince 2017
from 70.5% in 2017
US average: 91.0%
English only at home
97.3%
−1.1 ptssince 2016
from 98.5% in 2016
US average: 77.7%
Spanish at home
1.2%
+1.0 ptssince 2016
from 0.1% in 2016
US average: 13.6%
Marital status
Men 15+
Never married19.3%(304)
Married66.3%(1,046)
Widowed3.7%(58)
Divorced10.7%(169)
Women 15+
Never married21.1%(333)
Married64%(1,010)
Widowed6.3%(100)
Divorced8.5%(134)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Drill deeper

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Head to head

Compare Sweet Grass County to nearby counties

SWEET GRASS COUNTY VS
Stillwater County
Income$84,732+10%
Home value$405,800+23%
Population9,445+151%
SEE FULL COMPARISON →
SWEET GRASS COUNTY VS
Park County
Income$70,047−9%
Home value$467,500+42%
Population18,214+384%
SEE FULL COMPARISON →
SWEET GRASS COUNTY VS
Wheatland County
Income$49,489−36%
Home value$180,800−45%
Population2,100−44%
SEE FULL COMPARISON →
SWEET GRASS COUNTY VS
Golden Valley County
Income$58,333−24%
Home value$212,200−36%
Population844−78%
SEE FULL COMPARISON →
Frequently asked

How many people live in Sweet Grass County, Montana?

Sweet Grass County, Montana has about 3,720 residents according to the 2024 American Community Survey.

What is the median household income in Sweet Grass County, Montana?

The typical household in Sweet Grass County, Montana earns about $77,000 a year. Half of households make more than that, and half make less.

Is Sweet Grass County, Montana expensive?

In Sweet Grass County, Montana, the median home is worth about $330,100, and the typical rent is about $1,149 a month.

How educated are people in Sweet Grass County, Montana?

About 24.4% of adults age 25 and over in Sweet Grass County, Montana hold a bachelor's degree or higher.

What is the poverty rate in Sweet Grass County, Montana?

About 7.9% of people in Sweet Grass County, Montana live below the federal poverty line.

Has Sweet Grass County, Montana grown since 1990?

Yes, Sweet Grass County, Montana has grown since 1990. The population has added about 566 residents, a change of about 18 percent over that period.

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Explore from here

1 census tract
Census Tract 9670
4 ZIP codes
ZIP 59011ZIP 59033ZIP 59052ZIP 59055
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →