Saint Marie, MT demographics:
population, income, and more

Total population
306
-4.1% year-over-year change
Median household income
$38,971/yr
2.2% year-over-year change
Housing units
688
-11.1% year-over-year change

Saint Marie population

How many people live in Saint Marie

Saint Marie is home to 306 residents, according to the most recent Census data. Gender-wise, 30.1% of Saint Marie locals are male, and 69.9% are female.

Total population
306
-4.1% year-over-year change
Gender ratio
Male
30.1%
92
Female
69.9%
214
Value Percent YoY change
Male 92 30.1% -1.1%
Female 214 69.9% -5.3%
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 Saint Marie is 38, with the population distributed as follows: about 4.2% are children under 15, then 8.2% are in the 15 to 24 age group. Adults between 25 and 44 make up 55.9% of the population, while another 2.9% fall into the 45 to 64 bracket. Finally, around 28.8% are 65 or older.

Median age
37.9
Age breakdown
Under 15
4.2%
15 to 24
8.2%
25 to 44
55.9%
45 to 64
2.9%
Over 65
28.8%
Value Percent YoY change
Under 15 13 4.2% 30.0%
15 to 24 25 8.2% 0.0%
25 to 44 171 55.9% 5.6%
45 to 64 9 2.9% -18.2%
Over 65 88 28.8% -20.7%
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

There’s also a share of 44.1% that includes residents with two or more races.

Citizenship
U.S.-born citizens
100%
Non-U.S.-born citizens
0%
Non-citizens
0%
Value Percent YoY change
U.S.-born citizens 306 100% -4.1%
Racial breakdown
White
55.9%
Black or African American
0%
American Indian and Alaska Native
0%
Asian
0%
Native Hawaiian and other Pacific Islander
0%
Two or more races
44.1%
Other
0%
Value Percent
White 171 55.9%
Two or more races 135 44.1%

Households in Saint Marie

A peek inside Saint Marie households

Saint Marie has 92 households, with an average of 3 members in each. Of these, 59.8% are families, while the remaining 40.2% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
92
-23.3% year-over-year change
Average people per household
3
Non-family households
37
Family households
55
Value Percent YoY change
Non-family households 37 40.2% -47.1%
Family households 55 59.8% 10.0%
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 Saint Marie

The housing landscape of Saint Marie

Saint Marie's housing consists of 688 units, with 6.8% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 12.2% and offer a more compact, shared living style.

Housing units
688
-11.1% year-over-year change
Housing types
Value Percent
1 unit, detached 47 6.8%
1 unit, attached 84 12.2%
2 units 148 21.5%
3 or 4 units 409 59.4%
Homes built since 2020
% year-over-year change

The age of buildings in Saint Marie

In Saint Marie, the median construction year is 1964. Most development happened in the second half of the 20th century.

Construction year breakdown by decade
Value Percent YoY change
Built between 1950 and 1959 145 21.1% -24.1%
Built between 1960 and 1969 539 78.3% -6.9%
Built between 1970 and 1979 4 0.6% 0.0%
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.

Saint Marie occupancy rates

Out of the 92 occupied housing units in Saint Marie, 89.1% are owner-occupied, while 10.9% are lived in by tenants. Meanwhile, 86.6% of all homes on the local market sit vacant.

Occupied housing units
92
-23.3% year-over-year change
Occupancy breakdown
Renter occupied
10
Owner occupied
82
Value Percent YoY
change
Renter occupied 10 10.9% 0.0%
Owner occupied 82 89.1% -25.4%
Unoccupied housing units
86.6%
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.

Saint Marie housing costs

Median housing costs per month
$432/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.

Education in Saint Marie

Saint Marie education at a glance

About 50.2% of the population in Saint Marie went to high school, while 17.1% pursued college studies. Another earned an associate degree and 22.5% hold a bachelor’s.

Education level
Value Percent YoY change
No high school 30 10.2% 0.0%
High school diploma 147 50.2% 6.5%
College diploma 50 17.1% -19.4%
Bachelor's degree 66 22.5% 0.0%
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 Saint Marie

How much people earn in Saint Marie

The average annual household income in Saint Marie was $45,637 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +23.9% change from the previous year. At the same time, the median income stood at $38,971, reflecting a +2.2% shift over the same period.

Average household income in Saint Marie
$45,637/year
23.9% year-over-year change
Median household income in Saint Marie
$38,971/year
2.2% year-over-year change

Saint Marie income by age

Overall, 76.1% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Over 65 $57,596 46.0%
Above poverty level
233
Below poverty level
73
Value Percent YoY
change
Above poverty level 233 76.1% 1.3%
Below poverty level 73 23.9% -18.0%

Employment in Saint Marie

Workforce and job types in Saint Marie

Also, 46.6% run their own businesses, 48% are employed by private companies, and 5.5% work in the public sector.

Workforce demographics

White collar
73
Blue collar
Value Percent YoY change
White collar 73 100% 2.8%
Employer type
Self employees
46.6%
Private companies
48%
Governmental workers
5.5%
Not for profit companies
0%
Value Percent YoY change
Self employees 34 46.6% 3.0%
Private companies 35 48% 2.9%
Governmental workers 4 5.5% 0.0%

Transportation in Saint Marie

How people get around in Saint Marie

Means of transportation
Value Percent YoY change
Car 55 100% -1.8%
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 Saint Marie by zipcode?

Zipcode Population Number of households Median income Average income
59231 306 92 $38,971 $45,637

Explore more communities

FAQs about Saint Marie demographics 

What is the total population of Saint Marie?

Saint Marie has a total population of 306 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 -4.1% compared to a year ago.

What is the gender ratio in Saint Marie?

The gender ratio in Saint Marie is as follows:
  • 30.1% males (92 residents)
  • 69.9% females (214 residents)

What is the median age in Saint Marie?

The median age in Saint Marie is 37.9.

What is the age distribution of the population in Saint Marie?

The age distribution in Saint Marie is as follows:
  • Under 15: 4.2% (13 residents)
  • Ages 15-24: 8.2% (25 residents)
  • Ages 25-44: 55.9% (171 residents)
  • Ages 45-64: 2.9% (9 residents)
  • Over 65: 28.8% (88 residents)

What is the racial and ethnic makeup of Saint Marie?

The racial and ethnic makeup of Saint Marie is as follows:
  • White: 55.9% (171 residents)
  • Black or African American: 0% ( residents)
  • American Indian and Alaska Native: 0% ( residents)
  • Asian: 0% ( residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 44.1% (135 residents)
  • Other: 0% ( residents)

What percentage of the population in Saint Marie are U.S.-born citizens?

U.S.-born citizens represent 100% of the population in Saint Marie.

How many housing units are there in Saint Marie?

There are 688 housing units in Saint Marie, reflecting a -11.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Saint Marie and what is the average household size?

Saint Marie has a total of 92 households, with an average of 3 people in each.

What is the median household income in Saint Marie?

Saint Marie has a median household income of $38,971, representing a +2.2% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Saint Marie?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 100% (73 residents)
  • Blue-collar workers: 0% ( residents)

Places of employment:
  • Self-employed: 46.6% (34 residents)
  • Private companies: 48% (35 residents)
  • Governmental workers: 5.5% (4 residents)
  • Not-for-profit companies: 0% ( 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