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St. Marie, MT
Census-designated place in Valley County, Montana. ZIP codes: 59231.
Population
306
Land area
22.9sq mi
People per sq mi
13
ZIP codes
1
St. Marie and its ZIP codes
St. Marie at a glance
- St. Marie is 74% denser than Montana as a whole.
Economy and federal money
Jobs, pay, income and spending are for Valley County. PPP loans are for St. Marie.
Unemployment rate
2.1%
Sep 2026, -0.9 pts in a year
Average annual pay
$52,397
2,826 jobs, 2025
Income per person
$59,938
BEA, 2024
Federal spending
$163M
FY 2026, $21,542 per person
PPP loans
$5,417
1 loan, 1 job reported
Environment and hazard risk
St. Marie, MT, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: hail
Storm events since 1996
1,725
Countywide, mostly thunderstorm wind
Flood insurance policies
17
0.3% of homes, county
July high / Jan low
85° / 6°F
11.8 inches of rain a year
Health statistics
Share of adults in St. Marie, MT, CDC PLACES estimates
Obesity
32.9%
U.S. 33.3% about the same
Diabetes
12.0%
U.S. 12.1% about the same
Smoking
14.8%
U.S. 12.8% +2.0 pts
Uninsured (18-64)
10.7%
U.S. 11.1% about the same
ZIP codes in St. Marie
1 in or overlapping St. Marie. Population shown
Cities near St. Marie
| Name | Distance | Land area (sq mi) |
|---|---|---|
| GlasgowCity | 15 mi | 1.4 |
| NashuaTown | 20 mi | 0.7 |
| HinsdaleCensus-designated place | 26 mi | 6.5 |
| Fort PeckTown | 27 mi | 0.9 |
Frequently asked questions
- What county is St. Marie, MT in?
- St. Marie is in Valley County, Montana.
- What ZIP codes are in St. Marie, MT?
- ZIP codes in or overlapping St. Marie include 59231.
- What is the population of St. Marie, MT?
- About 306 people live in St. Marie, based on American Community Survey 5-year estimates.
- What cities are near St. Marie?
- Nearby places include Glasgow (15 mi), Nashua (20 mi), Hinsdale (26 mi), Fort Peck (27 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023