Big Arm
Census-designated place in Lake County, Montana

Big Arm is an unincorporated community (census-designated place) in Lake County, Montana, with 218 residents (2020 Census). It sits at 2,953 ft (900 m) above sea level. The nearest town is Lindisfarne, 3.0 miles E.
- 218residents (2020 Census)
- 2,953 ftelevation · 900 m
- 5.4 sq miland area · 14.0 km²
- 40 / sq mipopulation density
- 59910ZIP code
About Big Arm
Big Arm is a census-designated place (CDP) in Lake County, Montana, United States. As of the 2020 census, Big Arm had a population of 218.
The town is situated on the south side of Big Arm, a large bay on Flathead Lake, hence its name. The name was used by the Kootenai people, who lived there prior to the town being established. The post office opened in 1911, with Marion F. Lamb as postmaster.
Big Arm State Park is located just north of the town.
Text: Wikipedia · CC BY-SA 4.0
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Open in Google Maps ›Big Arm, MT population
Big Arm had 218 residents in the 2020 Census.
| 2020 Census | 218 |
|---|---|
| Density | 40 per sq mi (16 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Big Arm at a glance
| State | Montana (MT) |
|---|---|
| County | Lake County |
| Type | Census-designated place |
| Population | 218 (2020) |
| Land area | 5.42 sq mi (14.0 km²) |
| Elevation | 2,953 ft (900 m) |
| Coordinates | 47.7936° N, 114.2700° W |
| ZIP code | 59910 |
| Census code (GEOID) | 3005800 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Big Arm
- Lindisfarne3.0 mi E
- Elmo4.4 mi NW
- Dayton4.9 mi N
- Kings Point5.8 mi E
- Rocky Point5.8 mi SE
- Jette6.5 mi SE
- Rollins8.8 mi NE
- Kerr9.0 mi SE
- Polson9.4 mi SE
- Finley Point9.5 mi E
- Lake Mary Ronan9.9 mi NW
- Turtle Lake12.1 mi SE
Straight-line distance between town centers.
Frequently asked questions about Big Arm
What county is Big Arm in?
Big Arm is in Lake County, Montana.
What is the population of Big Arm, MT?
218 people lived in Big Arm at the 2020 Census.
What is the ZIP code of Big Arm, MT?
The ZIP code of Big Arm is 59910.
What is the elevation of Big Arm?
2,953 feet (900 m) above sea level.
What towns are near Big Arm?
Lindisfarne (3.0 mi), Elmo (4.4 mi), Dayton (4.9 mi), Kings Point (5.8 mi), Rocky Point (5.8 mi).
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