St. Marie Flag

St. Marie

County:
Valley County
County Seat:
No
Area (mi²):
22.898
State:
Montana

St. Marie is a CDP located in Valley County, Montana. St. Marie has a 2025 population of 469. St. Marie is currently growing at a rate of 3.08% annually and its population has increased by 44.31% since the most recent census, which recorded a population of 325 in 2020.

The average household income in St. Marie is $36,824 with a poverty rate of 27.9%.The median age in St. Marie is 39.3 years: 38.3 years for males, and 40 years for females.

469
Total Population
20
Density (mi²)
14 3.08%
Growth

St. Marie Population

St. Marie Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of St. Marie includes 55.8% White, 4.08% Native American, and smaller percentages for and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White17855.8%
Two or more races12840.13%
Native American134.08%

St. Marie Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Marie's average per capita income is $22,042. Household income levels show a median of $38,125. The poverty rate stands at 27.9%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Families$39,844$53,830
Households$38,125$36,824
Married Families--
Non Families-$24,677

$22,042

Average Income

$38,125

Median Household Income

27.9%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)