59910 ZIP Code — Big Arm, MT

Lake County, Montana

ZIP code 59910 is located in Big Arm, Montana, within Lake County. It covers approximately 19.25 square miles and serves a population of 658 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 406.

About ZIP code 59910

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $538,000. Owner-occupancy is high at 75%, well above the national average.

The dominant occupation class is management, business, and professional, with public administration as the leading industry. The average commute of 32 minutes is near the national average.

Educational attainment is near the national average, with 26% of residents holding a bachelor's degree or higher.

29% of residents lack health insurance, above the national average.

Overall, ZIP code 59910 reflects a community defined by economic challenges above the national average, high homeownership, and a significant Social Security-dependent population.

658

population

19.25

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

59910 ZIP code map

Cities in ZIP code 59910

Below are the cities the US Postal Service accepts for ZIP code 59910. Using any city not on this list may result in mail delivery delays.

City	Status
Big Arm	Preferred

Nearby ZIP codes

59860 Polson (4 mi) 59915 Elmo (4.8 mi) 59914 Dayton (5.9 mi) 59922 Lakeside (15.3 mi) 59845 Hot Springs (15.3 mi) 59848 Lonepine (16.3 mi) 59920 Kila (19.2 mi)

Demographics updated 06/2026

Population
Total population	658
Population density	34 / sq mi
State FIPS	30
County FIPS	047

Geography
Land area	19.25 sq mi
Water area	41.55 sq mi
Latitude	47.7854
Longitude	-114.2989
Timezone	Mountain (MT)
Area code	406

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.9%	50.0%	44.2%
$50k – $100k	20.9%	30.3%	32.0%
$100k – $200k	59.2%	16.9%	19.2%
Over $200k	0.0%	2.8%	4.7%

Demographics & statistics

658

Population

People per sq mi

54.7

Median age

Median household income

$45,851

Per capita income

$538,000

Median home value

Median monthly rent

75.1%

Home ownership

23.3%

Poverty rate

13.2%

Unemployment

382

Housing units

25.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	79	12.0%
18 and over	579	88.0%
65 and over	204	31.0%
Median age	54.7 years

Race & ethnicity

White 65.1%

American Indian / Alaska Native 29.6%

Hispanic or Latino 2.7%

Other race 2.7%

Group	Count	%
White	440	65.1%
American Indian / Alaska Native	200	29.6%
Hispanic or Latino	18	2.7%
Other race	18	2.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.9%	50.0%	44.2%
$50k – $100k	20.9%	30.3%	32.0%
$100k – $200k	59.2%	16.9%	19.2%
Over $200k	0.0%	2.8%	4.7%

Under $10k 17.4%

$25k–$35k 5.3%

$50k–$75k 27.5%

$75k–$100k 4.5%

$100k–$150k 6.8%

$150k–$200k 31.7%

$200k+ 6.8%

Range	% of households
Under $10k	17.4%
$25k–$35k	5.3%
$50k–$75k	27.5%
$75k–$100k	4.5%
$100k–$150k	6.8%
$150k–$200k	31.7%
$200k+	6.8%
Median income	$0

Housing

Home values

Under $50k 6.0%

$50k–$100k 11.6%

$200k–$300k 17.6%

$300k–$500k 9.5%

$500k–$1M 49.7%

$1M+ 5.5%

Housing overview

Metric	Value
Median home value	$538,000
Median rent / month	$0
Owner occupied	75.1%
Renter occupied	24.9%
Vacant	40.8%
Single-family detached	90.0%
Large apartment buildings	0.0%
Mobile homes	10.0%
Median rooms	6.1
Avg household size (owned)	2.65

Year built

Era	%
2020 or later	0.0%
2010–2019	25.0%
2000–2009	7.4%
1990–1999	30.8%
1980–1989	20.1%
1970–1979	5.1%
1960–1969	2.2%
1950–1959	9.4%
1940–1949	0.0%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	3.3%
1 bedroom	10.7%
2 bedrooms	28.6%
3 bedrooms	36.8%
4 bedrooms	20.5%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	8.7%
2 vehicles	27.2%
3 or more	64.2%

Heating fuel

Fuel type	%
Utility gas	2.3%
Electricity	45.7%
Propane / LP gas	30.2%
Wood	21.9%

Households & families

Household type	Count	%
Married-couple family	208	78.5%
Cohabiting couple	0	0.0%
Male householder, no spouse	43	16.2%
Female householder, no spouse	14	5.3%
Households with children under 18	50	18.9%
Households with seniors (65+)	152	57.4%
Average household size	2.48

Marital status

Status	Male	Female
Never married	21.2%	28.7%
Married	78.8%	66.6%
Separated	0.0%	0.0%
Widowed	0.0%	0.0%
Divorced	0.0%	4.7%

Education

Less than 9th grade 0.0%

Some HS, no diploma 7.1%

HS graduate 17.9%

Some college, no degree 36.5%

Associate's degree 12.8%

Bachelor's degree 22.2%

Graduate / professional 3.6%

Metric	%
HS diploma or higher	92.9%
Bachelor's or higher	25.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	15	10.9%
High school	38	27.5%
College / grad school	85	61.6%

Employment

Industry of employment

Public administration 24.5%

Information 19.9%

Education & healthcare 19.5%

Retail trade 7.8%

Manufacturing 6.7%

Agriculture & mining 5.3%

Arts, food & hospitality 5.0%

Construction 4.3%

Finance & real estate 3.5%

Professional & management 3.5%

Occupation

Category	%
Management, business & arts	49.3%
Service	9.9%
Sales & office	31.2%
Natural resources & construction	9.6%
Production & transportation	0.0%

Employment type

Type	%
Private sector	69.1%
Government	30.9%
Self-employed	0.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	88.3%
Carpool	5.3%
Public transit	0.0%
Walk	0.0%
Work from home	6.4%
Other means	0.0%
Avg commute (minutes)	31.9

Poverty

All people 23.3%

Under 18 years 32.9%

18 and over 21.9%

Married-couple families 22.1%

Female-led households 0.0%

Income support

Source	% of households
Social Security	48.7%
Retirement income	20.8%
Supplemental Security	0.0%
Cash public assistance	8.7%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	31.3%
High blood pressure	36.9%
High cholesterol	37.3%
Diabetes	12.9%
Heart disease	9.1%
Stroke	4.1%
Asthma	9.8%
Arthritis	32.8%
Kidney disease	3.8%
Pulmonary disease	8.2%
Cancer	9.5%

Behavior / access	%
Smoking	16.0%
Binge drinking	16.6%
No physical activity	21.3%
Less than 7 hrs sleep	29.1%
Depression	19.3%
Fair or poor health	14.7%
Poor mental health	11.5%
Poor physical health	12.1%
No health insurance	10.0%
Visited doctor (checkup)	73.3%
Visited dentist	65.5%
Cholesterol screening	92.7%
Teeth loss	12.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	47	8.1%

Disability	%
Any disability	10.2%
Under 18	0.0%
18–64 years	0.0%
65 and over	32.8%

Health insurance coverage

Type	%
Private insurance	50.2%
Public insurance	45.3%
No insurance	29.2%
Uninsured under 19	30.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	632	96.0%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	658	100.0%
Born in same state	658	100.0%
Born in different state	353	53.6%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Dutch	69	10.5%
Italian	52	7.9%

Ancestry	Count	%
French	35	5.3%
Arab	21	3.2%

Technology access

Metric	% of households
Computer access	40.3%
Internet access	94.7%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 59910

What city is ZIP code 59910 in?

ZIP code 59910 is primarily assigned to Big Arm, Montana.

What county is ZIP code 59910 in?

ZIP code 59910 falls within Lake County, Montana.

Does ZIP code 59910 have an older population?

31% of residents in ZIP code 59910 are 65 or older, above the national average of ~17%.

Does ZIP code 59910 have a large retiree population?

49% of households in ZIP code 59910 receive Social Security income, suggesting a significant retiree or disability population.

What is the poverty rate in ZIP code 59910?

23% of residents in ZIP code 59910 live below the poverty line, above the national average.

What is the typical home value in ZIP code 59910?

The median home value in ZIP code 59910 is $538,000.

What timezone is ZIP code 59910 in?

ZIP code 59910 observes the MST timezone.