St. Regis is a community in Mineral County, Montana, home to about 406 people across 0.9 square miles. Its ZIP code is 59866.
Homes sold for a median of $304 per square foot in the three months ending August 2026, a balanced market.
Each card is that ZIP code’s whole market, including any part outside St. Regis. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up St. Regis’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Spokane International Airport (GEG)112 miles away |
|---|---|
| Closer regional airport | Missoula Montana Airport (MSO)58 miles away |
| Nearest city of 250,000+ | Seattle, WA336 miles away |
Straight-line distances from the center of St. Regis; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
St. Regis had 313 residents in the 2020 census, down 1% since 2000.
It’s the 170th largest of 475 towns in Montana by population.
Mineral County grew from 2,327 residents in 1920 to 4,535 in 2020.
Mineral County, 1920–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 17°F. About 37.1 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Haugan 1 W, MT weather station (12 miles away).
809 jobs at 144 businesses in Mineral County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
4 doctors and other health care providers list an office in St. Regis.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 2 |
|---|---|
| Mental health providers | 2 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Libraries
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by St Regis K-12 Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| St Regis SchoolSt Regis | Pre-K–6 | 105 | Public | 4.1 mi |
| St Regis 7-8St Regis | 7–8 | 31 | Public | 4.1 mi |
| St Regis High SchoolSt Regis | 9–12 | 54 | Public | 4.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.