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 Black or African American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Native American

Black or African American

Asian

Native Hawaiian or Pacific Islander

Other race

Race
Population
Percentage (of total)
White17855.8%
Two or more races12840.13%
Native American134.08%
Black or African American00%
Asian00%
Native Hawaiian or Pacific Islander00%
Other race00%

St. Marie Marital Status

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

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)