Sweet Grass County, MT demographics:
population, income, and more

Total population
3,720
0.2% year-over-year change
Median household income
$77,000/yr
10.9% year-over-year change
Housing units
1,900
-1.5% year-over-year change

Sweet Grass County population

How many people live in Sweet Grass County

Sweet Grass County is home to 3,720 residents, according to the most recent Census data. Gender-wise, 50.3% of Sweet Grass County locals are male, and 49.7% are female.

Total population
3,720
0.2% year-over-year change
Gender ratio
Male
50.3%
1,870
Female
49.7%
1,850
Value Percent YoY change
Male 1,870 50.3% 0.4%
Female 1,850 49.7% 0.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Sweet Grass County is 47, with the population distributed as follows: about 15.2% are children under 15, then 12.2% are in the 15 to 24 age group. Adults between 25 and 44 make up 20.2% of the population, while another 26.6% fall into the 45 to 64 bracket. Finally, around 25.8% are 65 or older.

Median age
47
Age breakdown
Under 15
15.2%
15 to 24
12.2%
25 to 44
20.2%
45 to 64
26.6%
Over 65
25.8%
Value Percent YoY change
Under 15 566 15.2% -3.6%
15 to 24 454 12.2% -6.6%
25 to 44 753 20.2% -6.8%
45 to 64 988 26.6% 2.6%
Over 65 959 25.8% 10.4%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Sweet Grass County, 97.9% of the population are US-born citizens, while 1.9% have gained naturalized citizenship. At the same time, 0.2% of residents are non-citizens. As for race, 90.8% of locals are Caucasian, 1% are African American and 0.2% have Asian roots. There’s also a share of 4.8% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97.9%
Non-U.S.-born citizens
1.9%
Non-citizens
0.2%
Value Percent YoY change
U.S.-born citizens 3,643 97.9% -0.1%
Non-U.S.-born citizens 71 1.9% 14.5%
Non-citizens 6 0.2% 20.0%
Racial breakdown
White
90.8%
Black or African American
1%
American Indian and Alaska Native
1.7%
Asian
0.2%
Native Hawaiian and other Pacific Islander
0%
Two or more races
4.8%
Other
1.5%
Value Percent
White 3,376 90.8%
Black or African American 39 1%
American Indian and Alaska Native 63 1.7%
Asian 7 0.2%
Two or more races 178 4.8%
Other 57 1.5%

Households in Sweet Grass County

A peek inside Sweet Grass County households

Sweet Grass County has 1,552 households, with an average of 2 members in each. Of these, 68.7% are families, while the remaining 31.3% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
1,552
3.7% year-over-year change
Average people per household
2
Non-family households
486
Family households
1,066
Value Percent YoY change
Non-family households 486 31.3% -6.9%
Family households 1,066 68.7% 9.3%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Sweet Grass County

The housing landscape of Sweet Grass County

Sweet Grass County's housing consists of 1,900 units, with 82.4% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 2% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 9% of the housing landscape.

Housing units
1,900
-1.5% year-over-year change
Housing types
Value Percent
1 unit, detached 1,566 82.4%
1 unit, attached 38 2%
2 units 47 2.5%
3 or 4 units 52 2.7%
5 to 9 units 27 1.4%
Mobile home 170 9%
Homes built since 2020
6
% year-over-year change

The age of buildings in Sweet Grass County

In Sweet Grass County, the median construction year is 1979. About 22% of homes were built before the 1940s, with another 6.1% going up by 1949. Most development happened in the second half of the 20th century. Then, 14.4% of homes were added from 2000 to 2009, 8.2% between 2010 and 2019, and 0.3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 417 22% 1.2%
Built between 1940 and 1949 116 6.1% 6.4%
Built between 1950 and 1959 94 5% 10.6%
Built between 1960 and 1969 88 4.6% 46.7%
Built between 1970 and 1979 261 13.7% -21.6%
Built between 1980 and 1989 235 12.4% -12.6%
Built between 1990 and 1999 254 13.4% -13.3%
Built between 2000 and 2009 274 14.4% 1.1%
Built between 2010 and 2019 155 8.2% 59.8%
Built in 2020 or later 6 0.3% N/A
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Sweet Grass County occupancy rates

Out of the 1,552 occupied housing units in Sweet Grass County, 79.7% are owner-occupied, while 20.3% are lived in by tenants. Meanwhile, 18.3% of all homes on the local market sit vacant.

Occupied housing units
1,552
3.7% year-over-year change
Occupancy breakdown
Renter occupied
315
Owner occupied
1,237
Value Percent YoY
change
Renter occupied 315 20.3% -11.8%
Owner occupied 1,237 79.7% 8.5%
Unoccupied housing units
18.3%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Sweet Grass County housing costs

Housing costs in Sweet Grass County come to a median of $1,016 per month, while tenants specifically pay a median gross rent of $1,149.

Median housing costs per month
$1,016/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Sweet Grass County
$1,149/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Sweet Grass County

Sweet Grass County education at a glance

About 37.6% of the population in Sweet Grass County went to high school, while 30% pursued college studies. Another 9.7% earned an associate degree and 16.5% hold a bachelor’s. Meanwhile, 6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 8 0.3% -11.1%
High school diploma 1,118 37.6% -2.3%
College diploma 893 30% -0.6%
Associate degree 288 9.7% 6.7%
Bachelor's degree 490 16.5% 4.7%
Graduate degree 177 6% 6.0%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Sweet Grass County

How much people earn in Sweet Grass County

The average annual household income in Sweet Grass County was $102,866 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +8.3% change from the previous year. At the same time, the median income stood at $77,000, reflecting a +10.9% shift over the same period.

Average household income in Sweet Grass County
$102,866/year
8.3% year-over-year change
Median household income in Sweet Grass County
$77,000/year
10.9% year-over-year change

Sweet Grass County income by age

In Sweet Grass County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $95,167. Those with someone between 45 and 64 in charge, often well established professionally, earn $100,721 overall. Overall, 92% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $95,167 9.5%
45 - 64 $100,721 16.1%
Over 65 $63,452 31.0%
Above poverty level
3,341
Below poverty level
290
Value Percent YoY
change
Above poverty level 3,341 92% 0.1%
Below poverty level 290 8% 0.7%

Employment in Sweet Grass County

Workforce and job types in Sweet Grass County

The job market in Sweet Grass County is powered by 1,951 working residents, spread across a range of industries and roles. 59.9% of the working population are employed in professional or administrative positions, while 40.1% are in hands-on or service-based jobs. Also, 25.6% run their own businesses, 50.2% are employed by private companies, and 16.7% work in the public sector.

Workforce demographics

Working population
1,951
6.7% year-over-year change
White collar
1,169
Blue collar
782
Value Percent YoY change
White collar 1,169 59.9% 3.2%
Blue collar 782 40.1% 12.4%
Employer type
Self employees
25.6%
Private companies
50.2%
Governmental workers
16.7%
Not for profit companies
7.5%
Value Percent YoY change
Self employees 499 25.6% -2.0%
Private companies 980 50.2% 2.4%
Governmental workers 325 16.7% 41.9%
Not for profit companies 147 7.5% 9.7%
Unemployment rate
1.8%
-14.6% year-over-year change

Available workforce

The unemployment rate in Sweet Grass County stands at 1.8%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Sweet Grass County

How people get around in Sweet Grass County

In Sweet Grass County, the average commute time is 24 minutes. Commuting methods vary: 76% of residents travel by personal vehicle and 4.4% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
24 min
3.4% year-over-year change
Means of transportation
Value Percent YoY change
Car 1,473 76% 3.0%
Bus or trolleybus 34 1.8% -12.8%
Walk 86 4.4% 41.0%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Sweet Grass County by zipcode?

Zipcode Population Number of households Median income Average income
59011 3,167 1,308 $78,000 $99,928
59033 231 85 $71,635 $89,087
59052 186 113 $60,547 $134,465
59055 40 17 $163,750 $141,882
59069 458 214 $72,500 $86,161

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FAQs about Sweet Grass County demographics 

What is the total population of Sweet Grass County?

Sweet Grass County has a total population of 3,720 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.2% compared to a year ago.

What is the gender ratio in Sweet Grass County?

The gender ratio in Sweet Grass County is as follows:
  • 50.3% males (1,870 residents)
  • 49.7% females (1,850 residents)

What is the median age in Sweet Grass County?

The median age in Sweet Grass County is 47.

What is the age distribution of the population in Sweet Grass County?

The age distribution in Sweet Grass County is as follows:
  • Under 15: 15.2% (566 residents)
  • Ages 15-24: 12.2% (454 residents)
  • Ages 25-44: 20.2% (753 residents)
  • Ages 45-64: 26.6% (988 residents)
  • Over 65: 25.8% (959 residents)

What is the racial and ethnic makeup of Sweet Grass County?

The racial and ethnic makeup of Sweet Grass County is as follows:
  • White: 90.8% (3,376 residents)
  • Black or African American: 1% (39 residents)
  • American Indian and Alaska Native: 1.7% (63 residents)
  • Asian: 0.2% (7 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 4.8% (178 residents)
  • Other: 1.5% (57 residents)

What percentage of the population in Sweet Grass County are U.S.-born citizens?

U.S.-born citizens represent 97.9% of the population in Sweet Grass County.

How many housing units are there in Sweet Grass County?

There are 1,900 housing units in Sweet Grass County, reflecting a -1.5% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Sweet Grass County and what is the average household size?

Sweet Grass County has a total of 1,552 households, with an average of 2 people in each.

What is the median household income in Sweet Grass County?

Sweet Grass County has a median household income of $77,000, representing a +10.9% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Sweet Grass County?

The employment rate is 98.2% in Sweet Grass County, with a workforce of 1,951 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 59.9% (1,169 residents)
  • Blue-collar workers: 40.1% (782 residents)

Places of employment:
  • Self-employed: 25.6% (499 residents)
  • Private companies: 50.2% (980 residents)
  • Governmental workers: 16.7% (325 residents)
  • Not-for-profit companies: 7.5% (147 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025