Big Arm, MT Profile: Facts, Map & Data


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Big Arm, Montana - Basic Facts

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The Big Arm Census Designated Place had a population of 192 as of July 1, 2017. Big Arm ranks in the lower quartile for Population Density and the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Montana. See peer rankings below.

The primary coordinate point for Big Arm is located at latitude 47.7936 and longitude -114.27 in Lake County. The formal boundaries for the Big Arm Census Designated Place (see map below) encompass a land area of 5.42 sq. miles and a water area of 0 sq. miles. Lake County is in the Mountain time zone (GMT -7). The elevation is 2,946 feet.

The Big Arm Census Designated Place (GNIS ID: 2407837) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

Montana is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Big Arm Census Designated Place is located within Flathead Division of Lake County.

Beneath the boundary map are tables with Big Arm population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Big Arm Census Designated Place, MT Boundary Map

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Boundary Maps: Flathead Division | Lake County | Montana Counties

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Big Arm, MT Data & Demographics (As of July 1, 2017)


Total Population 192
Daytime Population: Workers 27
Daytime Population: Residents 122
Total Daytime Population (TDP) 149
Ratio TDP/Total Population1 0.78
Population in Households 192
Population in Familes 154
Population in Group Qrtrs 0
Population Density2 35
Diversity Index3 53


Median Household Income $56,457
Average Household Income $74,639
Per Capita Income $31,643


Total Housing Units 180 (100%)
Owner Occupied HU 61 (33.9%)
Renter Occupied HU 16 ( 8.9%)
Vacant Housing Units 103 (57.2%)
Median Home Value $450,000
Average Home Value $561,475


Total Households 77
Average Household Size 2.49
Family Households 52
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 1.13% 1.12%
Households 0.93% 1.27%
Families 1.11% 1.13%
Median Household Income   1.2%
Per Capita Income   2.9%

Big Arm, MT - Peer Comparisons by Rank and Percentile

The table below compares Big Arm to the other 364 incorporated cities, towns and CDPs in Montana by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 252 31st
Population Density # 295 19th
Diversity Index # 21 95th
Median Household Income # 62 83rd
Per Capita Income # 87 76th

Additional comparisons and rankings can be made with a VERY EASY TO USE Montana Census Data Comparison Tool.

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