Montana · Census place 65400
St. Marie, MT population, income and ZIP codes
Quick answer
The population of the city of St. Marie, Montana (St. Marie, MT — Census place “St. Marie CDP”) is 319 residents, ranking #195 of 497 places in Montana. Median household income is $38,125, the median home is worth — and median gross rent runs — a month. Looking for the St. Marie Montana ZIP code list? 2 ZIP codes serve St. Marie, MT: 59230, 59231.
- Population
- 319St. Marie CDP residents
- Median household income
- $38,125Past 12 months, inflation adjusted
- Median home value
- —Owner-occupied units
- Median gross rent
- —Rent plus utilities, monthly
- Median age
- 39.3 yrsAll residents
- Homeownership rate
- 91.7%Owner-occupied households
St. Marie ZIP codes (Montana)
Census ZCTAs whose delivery area overlaps St. Marie.
The St. Marie MT ZIP code list below covers 2 ZIP codes. Open any one for its population, income, housing and rent profile.
What the numbers mean in St. Marie CDP
Housing cost measured against local earnings.
Poverty affects 27.9% of residents and 91.7% of households own their home.
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
St. Marie CDP, MT in context
How this area compares with national benchmarks.
St. Marie CDP is a very small community in Montana, with 319 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #195 of 497 ranked by population — larger than 60% of them. The median age here is 39.3 years against 39.1 nationally, a slightly older profile than the country as a whole. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.
Households in St. Marie CDP earn a median of $38,125 a year, 51.5% below the national figure of $78,538 and 39% below the $62,992 median for the 94 Montana cities we cover. This figure covers the household, not the worker: two people on ordinary wages at one address outrank a single professional in the same table. Poverty reaches 27.9% of residents here, well above the 12.4% national rate, which is the single clearest signal in this dataset that median income here is carried by a narrow band of households.
The typical owner-occupied home in St. Marie CDP is valued at not published, while median gross rent runs not published a month. 91.7% of occupied homes are owner-occupied versus 65% nationally, an owner-dominated market where rental listings are scarce and rent medians rest on a thin sample. Rent is reported gross — contract rent plus tenant-paid utilities — which is why it runs above the advertised price on a listing for the same unit.
With 319 residents, a handful of survey responses moves every median on this page. Compare St. Marie CDP against its county rather than against national figures.
The Census withheld home value, gross rent for St. Marie CDP because the sample was too thin to publish at this geography. Those values were suppressed at the source, not lost in our dataset, and we do not model a replacement. Everything else on this page comes straight from the ACS 2019-2023 ACS 5-year tables.
Compare with nearby places
Places of similar size in Montana.
- Philipsburg town 1,012
- Helena Flats CDP 1,014
- Pray CDP 1,018
- St. Ignatius town 1,053
- Harlowton city 1,054
- Plains town 1,077
- Gallatin Gateway CDP 1,092
- White Sulphur Springs city 1,097
Keep going
More Montana coverage.
Frequently asked questions
Common questions about this area.
- What is the population of St. Marie CDP?
- St. Marie CDP has 319 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #195 of 497 in Montana.
- What is the median household income in St. Marie CDP?
- Median household income in St. Marie CDP is $38,125 a year, 51.5% below the national figure of $78,538.
- How much does it cost to rent or buy in St. Marie CDP?
- Median gross rent is not published a month and the median home value is not published.
- Is St. Marie CDP affordable compared with the rest of the US?
- The Census does not publish enough home-value or income detail for St. Marie CDP to compute a reliable affordability ratio.
- How current is this St. Marie CDP data?
- All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.