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St. Marie, MT
Full City Profile · Montana · Valley County County
2.1
/5.0
C
Fair
319
Population
14/sq mi density
$38,125
Median Income
$16,802 per capita
44°F
Avg Temperature
200 sunny days/yr
147
Violent Crime/100K
1,674 property/100K
C
Overall
2.1 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Economy
2.6 / 5.0
$38,125 median income, 4.9% unemployment
F
Safety
1.0 / 5.0
147 violent crimes/100K
C+
Education
2.7 / 5.0
21.8% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-18%
389 → 319
over 10 years
Annual Pop. Growth
-1.96%
Compound annual growth rate
Median Income Change
+6.5%
$35,787 → $38,125
nominal, not inflation-adjusted
Annual Income Growth
+0.63%
Compound annual growth rate
Population Over Time
Total population for St. Marie across each available Census ACS release.
Median Household Income Over Time
Median household income reported by U.S. Census ACS. Values are nominal (not adjusted for inflation).
Projected 2030
Simple projections extrapolating the 2013–2023 compound annual growth rate forward. These are mathematical extensions of recent trends, not forecasts — real outcomes depend on migration, policy and economic shifts.
Projected Population 2030
278
-41 from 2023 (319)
Projected Median Income 2030
$39,838
+$1,713 from 2023 ($38,125)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 389 | — | $35,787 | — |
| 2015 | 619 | +59.1% | $28,304 | -20.9% |
| 2017 | 538 | -13.1% | $62,000 | +119.1% |
| 2019 | 470 | -12.6% | $33,750 | -45.6% |
| 2021 | 373 | -20.6% | $37,344 | +10.6% |
| 2023 | 319 | -14.5% | $38,125 | +2.1% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.