59866 ZIP Code — Saint Regis, MT

Mineral County, Montana

ZIP code 59866 is located in Saint Regis, Montana, within Mineral County. It covers approximately 222.41 square miles and serves a population of 941 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 406.

About ZIP code 59866

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $302,200. Owner-occupancy is high at 77%, well above the national average.

Median household income is $68,021. 59% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is sales and office, with construction as the leading industry. The average commute of 16 minutes is near the national average.

Educational attainment is near the national average, with 45% of residents holding a bachelor's degree or higher.

Health indicators show elevated rates of smoking (21%) compared to national benchmarks.

Notable community characteristics include a notable veteran presence at 13% of civilians, above the national average of 7%.

Overall, ZIP code 59866 reflects a community defined by a strong veteran community, high homeownership, and a significant Social Security-dependent population.

941

population

222.41

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

59866 ZIP code map

Cities in ZIP code 59866

Below are the cities the US Postal Service accepts for ZIP code 59866. Using any city not on this list may result in mail delivery delays.

City	Status
Saint Regis	Acceptable
Saint Regis	Preferred

Nearby ZIP codes

83873 Wallace (13.9 mi)

Demographics updated 06/2026

Population
Total population	941
Population density	4 / sq mi
State FIPS	30
County FIPS	061

Geography
Land area	222.41 sq mi
Water area	1.24 sq mi
Latitude	47.3211
Longitude	-115.3496
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	43.5%	49.2%	44.2%
$50k – $100k	26.0%	32.9%	32.0%
$100k – $200k	30.5%	15.4%	19.2%
Over $200k	0.0%	2.5%	4.7%

Demographics & statistics

941

Population

People per sq mi

49.5

Median age

$68,021

Median household income

$46,659

Per capita income

$302,200

Median home value

$865

Median monthly rent

76.5%

Home ownership

9.5%

Poverty rate

3.0%

Unemployment

586

Housing units

44.5%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

104

65–74

108

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	235	25.0%
18 and over	706	75.0%
65 and over	346	36.8%
Median age	49.5 years

Race & ethnicity

White 89.1%

American Indian / Alaska Native 3.3%

Two or more races 3%

Hispanic or Latino 2.2%

Black or African American 1.8%

Other race 0.6%

Group	Count	%
White	857	89.1%
American Indian / Alaska Native	32	3.3%
Two or more races	29	3%
Hispanic or Latino	21	2.2%
Black or African American	17	1.8%
Other race	6	0.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	43.5%	49.2%	44.2%
$50k – $100k	26.0%	32.9%	32.0%
$100k – $200k	30.5%	15.4%	19.2%
Over $200k	0.0%	2.5%	4.7%

Under $10k 2.6%

$15k–$25k 7.7%

$25k–$35k 6.4%

$35k–$50k 21.3%

$50k–$75k 18.6%

$75k–$100k 5.3%

$100k–$150k 12.2%

$150k–$200k 20.3%

$200k+ 5.8%

Range	% of households
Under $10k	2.6%
$15k–$25k	7.7%
$25k–$35k	6.4%
$35k–$50k	21.3%
$50k–$75k	18.6%
$75k–$100k	5.3%
$100k–$150k	12.2%
$150k–$200k	20.3%
$200k+	5.8%
Median income	$68,021

Housing

Home values

Under $50k 10.3%

$50k–$100k 6.7%

$150k–$200k 16.4%

$200k–$300k 15.9%

$300k–$500k 35.1%

$500k–$1M 14.2%

$1M+ 1.4%

Housing overview

Metric	Value
Median home value	$302,200
Median rent / month	$865
Owner occupied	76.5%
Renter occupied	23.5%
Vacant	32.6%
Single-family detached	81.3%
Large apartment buildings	0.0%
Mobile homes	16.8%
Median rooms	5.2
Avg household size (owned)	1.94

Year built

Era	%
2020 or later	0.0%
2010–2019	11.8%
2000–2009	21.8%
1990–1999	10.2%
1980–1989	5.0%
1970–1979	41.2%
1960–1969	3.7%
1950–1959	2.0%
1940–1949	1.4%
1939 or earlier	2.7%

Bedrooms

Size	% of units
No bedroom (studio)	3.7%
1 bedroom	21.8%
2 bedrooms	18.4%
3 bedrooms	43.5%
4 bedrooms	10.9%
5+ bedrooms	1.6%

Vehicles per household

Vehicles	% of households
No vehicle	1.7%
1 vehicle	46.3%
2 vehicles	33.7%
3 or more	18.3%

Heating fuel

Fuel type	%
Utility gas	3.2%
Electricity	12.8%
Propane / LP gas	50.5%
Wood	32.6%

Households & families

Household type	Count	%
Married-couple family	169	36.0%
Cohabiting couple	16	3.4%
Male householder, no spouse	126	26.9%
Female householder, no spouse	158	33.7%
Households with children under 18	92	19.6%
Households with seniors (65+)	273	58.2%
Average household size	1.98

Marital status

Status	Male	Female
Never married	21.7%	14.9%
Married	50.0%	46.8%
Separated	3.6%	0.0%
Widowed	6.6%	28.1%
Divorced	18.1%	10.1%

Education

Less than 9th grade 1.2%

Some HS, no diploma 3.9%

HS graduate 19.6%

Some college, no degree 26.6%

Associate's degree 4.2%

Bachelor's degree 38.7%

Graduate / professional 5.8%

Metric	%
HS diploma or higher	94.9%
Bachelor's or higher	44.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	21	8.6%
Kindergarten	15	6.1%
Elementary school	97	39.8%
High school	63	25.8%
College / grad school	48	19.7%

Employment

Industry of employment

Finance & real estate 26.9%

Construction 11.8%

Education & healthcare 11.5%

Transportation & utilities 9.5%

Arts, food & hospitality 8.7%

Agriculture & mining 8.1%

Retail trade 7.8%

Manufacturing 7.6%

Other services 6.4%

Public administration 1.1%

Professional & management 0.6%

Occupation

Category	%
Management, business & arts	23.0%
Service	13.4%
Sales & office	37.3%
Natural resources & construction	15.1%
Production & transportation	11.2%

Employment type

Type	%
Private sector	53.8%
Government	9.0%
Self-employed	37.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	65.0%
Carpool	4.9%
Public transit	0.0%
Walk	17.9%
Work from home	12.1%
Other means	0.0%
Avg commute (minutes)	16.3

Poverty

All people 9.5%

Under 18 years 20.9%

18 and over 5.7%

Married-couple families 1.2%

Female-led households 92.3%

Income support

Source	% of households
Social Security	59.1%
Retirement income	36.9%
Supplemental Security	6.8%
Cash public assistance	0.0%
Food stamps / SNAP	7.5%

Health indicators

Condition	%
Obesity	33.6%
High blood pressure	35.9%
High cholesterol	35.7%
Diabetes	12.5%
Heart disease	8.6%
Stroke	4.1%
Asthma	10.8%
Arthritis	31.8%
Kidney disease	3.6%
Pulmonary disease	9.6%
Cancer	7.6%

Behavior / access	%
Smoking	21.4%
Binge drinking	18.5%
No physical activity	24.1%
Less than 7 hrs sleep	32.8%
Depression	23.3%
Fair or poor health	17.0%
Poor mental health	13.6%
Poor physical health	13.7%
No health insurance	12.6%
Visited doctor (checkup)	70.6%
Visited dentist	57.6%
Cholesterol screening	89.1%
Teeth loss	15.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	89	12.6%

Disability	%
Any disability	16.3%
Under 18	1.3%
18–64 years	18.9%
65 and over	23.7%

Health insurance coverage

Type	%
Private insurance	52.0%
Public insurance	65.0%
No insurance	11.2%
Uninsured under 19	7.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	897	95.3%
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)	941	100.0%
Born in same state	921	97.9%
Born in different state	356	37.8%
Foreign born	20	2.1%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	165	17.5%
French	123	13.1%
Arab	68	7.2%

Ancestry	Count	%
Polish	52	5.5%
Dutch	9	1%

Technology access

Metric	% of households
Computer access	49.8%
Internet access	90.0%

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

Frequently asked questions about ZIP code 59866

What city is ZIP code 59866 in?

ZIP code 59866 is primarily assigned to Saint Regis, Montana.

What county is ZIP code 59866 in?

ZIP code 59866 falls within Mineral County, Montana.

Does ZIP code 59866 have an older population?

37% of residents in ZIP code 59866 are 65 or older, above the national average of ~17%.

Does ZIP code 59866 have a large retiree population?

59% of households in ZIP code 59866 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 59866 have a large veteran population?

13% of civilians in ZIP code 59866 are veterans, above the national average of ~7%.

What is the population of ZIP code 59866?

ZIP code 59866 has an estimated population of 941 residents, with a density of 4 people per square mile.

What timezone is ZIP code 59866 in?

ZIP code 59866 observes the MST timezone.