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Big Arm, MT
Census-designated place in Lake County, Montana.
Population
190
Land area
5.4sq mi
People per sq mi
35
ZIP codes
0
Big Arm and its ZIP codes
Big Arm at a glance
- Big Arm is about 4.6 times as dense as Montana as a whole.
Local data for Big Arm, MT
Counts from official public data
Economy and federal money
Jobs, pay, income and spending are for Lake County. PPP loans are for Big Arm.
Unemployment rate
3.3%
Aug 2026, -0.9 pts in a year
Average annual pay
$54,190
9,694 jobs, 2025
Income per person
$53,778
BEA, 2024
Federal spending
$582M
FY 2026, $18,691 per person
Environment and hazard risk
Big Arm, MT, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: winter weather
Storm events since 1996
1,125
Countywide, mostly heavy snow
Flood insurance policies
30
0.2% of homes, county
July high / Jan low
83° / 20°F
15.7 inches of rain a year
Hazards, floods and storm historyCheck a flood zone1 historic places
Health statistics
Share of adults in Big Arm, MT, CDC PLACES estimates
Obesity
33.9%
U.S. 33.3% +0.6 pts
Diabetes
13.4%
U.S. 12.1% +1.3 pts
Smoking
16.5%
U.S. 12.8% +3.7 pts
Uninsured (18-64)
9.1%
U.S. 11.1% -2.0 pts
Cities near Big Arm
| Name | Distance | Land area (sq mi) |
|---|---|---|
| LindisfarneCensus-designated place | 2.7 mi | 2.6 |
| ElmoCensus-designated place | 3.9 mi | 0.3 |
| DaytonCensus-designated place | 5 mi | 0.5 |
| Rocky PointCensus-designated place | 6.1 mi | 0.6 |
| Kings PointCensus-designated place | 6.4 mi | 1.4 |
| JetteCensus-designated place | 6.7 mi | 0.6 |
| PolsonCity | 9.1 mi | 4.5 |
| KerrCensus-designated place | 9.1 mi | 0.9 |
| RollinsCensus-designated place | 9.5 mi | 2.9 |
| Lake Mary RonanCensus-designated place | 10 mi | 1 |
| Finley PointCensus-designated place | 11 mi | 4.3 |
| Turtle LakeCensus-designated place | 13 mi | 0.6 |
| NiaradaCensus-designated place | 13 mi | 49.5 |
| Bear DanceCensus-designated place | 14 mi | 2.8 |
| LakesideCensus-designated place | 16 mi | 14.1 |
| PabloCensus-designated place | 16 mi | 4.8 |
Frequently asked questions
- What county is Big Arm, MT in?
- Big Arm is in Lake County, Montana.
- What is the population of Big Arm, MT?
- About 190 people live in Big Arm, based on American Community Survey 5-year estimates.
- What cities are near Big Arm?
- Nearby places include Lindisfarne (2.7 mi), Elmo (3.9 mi), Dayton (5 mi), Rocky Point (6.1 mi), Kings Point (6.4 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023