Belknap is a community in Sanders County, Montana, home to about 32 people across 4.8 square miles. It has no ZIP code of its own: it’s part of 59873.
Homes sold for a median of $277 per square foot in the three months ending August 2026, a balanced market.
Mostly Thompson Falls; part is in Belknap
Each card is that ZIP code’s whole market, including any part outside Belknap. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Belknap’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)101 miles away |
|---|---|
| Closer regional airport | Glacier Park International Airport (FCA)71 miles away |
| Nearest city of 250,000+ | Seattle, WA325 miles away |
Straight-line distances from the center of Belknap; 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.
Belknap had 161 residents in the 2020 census, up 2% since 2010.
It’s the 415th largest of 475 towns in Montana by population.
Sanders County grew from 3,713 residents in 1910 to 12,400 in 2020.
Sanders County, 1910–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 24°F. About 22.1 inches of rain and melted snow fall in a typical year, with about 15 inches of snow.
Source: NOAA 1991–2020 climate normals, Thompson Falls Ph, MT weather station (about a mile away).
2,585 jobs at 394 businesses in Sanders County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
30 doctors and other health care providers list an office in Belknap.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Dentists | 1 |
| Nurse practitioners and physician assistants | 3 |
| Mental health providers | 22 |
| Physical and occupational therapists | 1 |
| Chiropractors | 1 |
| Pharmacies | 3 |
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.
Parks (4 nearby)
Grocery stores
Libraries (1 nearby)
Museums (1 nearby)
Counts are within about 1.5 miles 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 Thompson Falls Elem, Thompson Falls H S. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Thompson Falls Elem SchlThompson Falls | Pre-K–6 | 240 | Public | 0.8 mi |
| Thompson Falls 7-8Thompson Falls | 7–8 | 68 | Public | 0.9 mi |
| Thompson Falls High SchlThompson Falls | 9–12 | 183 | Public | 1.8 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Building Bridges AcademyThompson Falls | 9–12 | 15 | Nonsectarian | 4.6 mi |
| Building Bridges AcademyThompson Falls | 9–12 | 7 | Nonsectarian | 4.6 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Thompson Falls.
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.