59436 ZIP Code — Fairfield, MT

Teton County, Montana

ZIP code 59436 is located in Fairfield, Montana, within Teton County. It covers approximately 246.94 square miles and serves a population of 2,222 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 406.

About ZIP code 59436

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $257,500. Owner-occupancy is high at 79%, well above the national average.

Median household income is $77,292. 34% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 24 minutes is near the national average. Remote work is prevalent — 20% of workers work from home.

Educational attainment is near the national average, with 27% of residents holding a bachelor's degree or higher.

Overall, ZIP code 59436 reflects a community defined by high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

2,222

population

246.94

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

59436 ZIP code map

Cities in ZIP code 59436

Below are the cities the US Postal Service accepts for ZIP code 59436. Using any city not on this list may result in mail delivery delays.

City	Status
Fairfield	Acceptable
Fairfield	Preferred

Nearby ZIP codes

59443 Fort Shaw (14.9 mi)

Demographics updated 06/2026

Population
Total population	2,222
Population density	9 / sq mi
State FIPS	30
County FIPS	099

Geography
Land area	246.94 sq mi
Water area	2.04 sq mi
Latitude	47.6340
Longitude	-112.1170
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	33.3%	44.9%	44.2%
$50k – $100k	43.2%	36.6%	32.0%
$100k – $200k	20.4%	15.7%	19.2%
Over $200k	3.1%	2.8%	4.7%

Demographics & statistics

2,222

Population

People per sq mi

35.0

Median age

$77,292

Median household income

$32,103

Per capita income

$257,500

Median home value

$1,025

Median monthly rent

79.0%

Home ownership

10.9%

Poverty rate

3.2%

Unemployment

740

Housing units

27.2%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

145

25–34

146

126

35–44

127

150

45–54

151

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	651	29.3%
18 and over	1,571	70.7%
65 and over	404	18.2%
Median age	35.0 years

Race & ethnicity

White 87.3%

Two or more races 4.6%

Hispanic or Latino 3.6%

Other race 2%

Black or African American 1.8%

American Indian / Alaska Native 0.8%

Group	Count	%
White	2,012	87.3%
Two or more races	105	4.6%
Hispanic or Latino	82	3.6%
Other race	45	2%
Black or African American	42	1.8%
American Indian / Alaska Native	18	0.8%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	33.3%	44.9%	44.2%
$50k – $100k	43.2%	36.6%	32.0%
$100k – $200k	20.4%	15.7%	19.2%
Over $200k	3.1%	2.8%	4.7%

Under $10k 5.6%

$10k–$15k 5.7%

$15k–$25k 5.5%

$25k–$35k 3.3%

$35k–$50k 8.7%

$50k–$75k 18.6%

$75k–$100k 24.2%

$100k–$150k 16.7%

$150k–$200k 5.0%

$200k+ 6.8%

Range	% of households
Under $10k	5.6%
$10k–$15k	5.7%
$15k–$25k	5.5%
$25k–$35k	3.3%
$35k–$50k	8.7%
$50k–$75k	18.6%
$75k–$100k	24.2%
$100k–$150k	16.7%
$150k–$200k	5.0%
$200k+	6.8%
Median income	$77,292

Housing

Home values

Under $50k 1.7%

$50k–$100k 4.9%

$100k–$150k 11.1%

$150k–$200k 17.2%

$200k–$300k 23.3%

$300k–$500k 34.4%

$500k–$1M 6.8%

$1M+ 0.6%

Housing overview

Metric	Value
Median home value	$257,500
Median rent / month	$1,025
Owner occupied	79.0%
Renter occupied	21.0%
Vacant	9.7%
Single-family detached	87.0%
Large apartment buildings	0.0%
Mobile homes	7.4%
Median rooms	6.1
Avg household size (owned)	2.74

Year built

Era	%
2020 or later	0.0%
2010–2019	3.4%
2000–2009	11.4%
1990–1999	9.9%
1980–1989	4.6%
1970–1979	11.7%
1960–1969	7.8%
1950–1959	15.4%
1940–1949	8.7%
1939 or earlier	27.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.8%
1 bedroom	7.4%
2 bedrooms	20.9%
3 bedrooms	38.1%
4 bedrooms	26.0%
5+ bedrooms	6.8%

Vehicles per household

Vehicles	% of households
No vehicle	7.9%
1 vehicle	10.0%
2 vehicles	32.6%
3 or more	49.5%

Heating fuel

Fuel type	%
Utility gas	43.6%
Electricity	10.6%
Propane / LP gas	27.9%
Fuel oil	1.3%
Wood	14.7%

Households & families

Household type	Count	%
Married-couple family	555	67.4%
Cohabiting couple	14	1.7%
Male householder, no spouse	110	13.3%
Female householder, no spouse	145	17.6%
Households with children under 18	335	40.7%
Households with seniors (65+)	277	33.6%
Average household size	2.69

Marital status

Status	Male	Female
Never married	21.2%	20.3%
Married	67.7%	66.2%
Separated	0.0%	0.0%
Widowed	2.4%	6.4%
Divorced	8.8%	7.1%

Education

Less than 9th grade 5.9%

Some HS, no diploma 6.6%

HS graduate 28.8%

Some college, no degree 23.7%

Associate's degree 7.8%

Bachelor's degree 17.6%

Graduate / professional 9.6%

Metric	%
HS diploma or higher	87.4%
Bachelor's or higher	27.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	47	8.1%
Kindergarten	29	5.0%
Elementary school	292	50.3%
High school	151	26.0%
College / grad school	62	10.7%

Employment

Industry of employment

Education & healthcare 24.5%

Agriculture & mining 20.1%

Transportation & utilities 9.1%

Construction 8.8%

Retail trade 7.9%

Public administration 7.8%

Finance & real estate 4.4%

Arts, food & hospitality 4.1%

Other services 3.9%

Manufacturing 3.4%

Professional & management 2.7%

Wholesale trade 2.2%

Information 1.3%

Occupation

Category	%
Management, business & arts	46.3%
Service	15.4%
Sales & office	11.7%
Natural resources & construction	19.0%
Production & transportation	7.6%

Employment type

Type	%
Private sector	59.4%
Government	21.9%
Self-employed	18.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	66.1%
Carpool	9.5%
Public transit	0.0%
Walk	2.4%
Work from home	20.2%
Other means	1.8%
Avg commute (minutes)	23.6

Poverty

All people 10.9%

Under 18 years 14.7%

18 and over 9.3%

Married-couple families 2.0%

Female-led households 39.7%

Income support

Source	% of households
Social Security	33.6%
Retirement income	18.3%
Supplemental Security	1.2%
Cash public assistance	2.5%
Food stamps / SNAP	9.5%

Health indicators

Condition	%
Obesity	28.6%
High blood pressure	29.2%
High cholesterol	30.9%
Diabetes	9.4%
Heart disease	7.1%
Stroke	3.2%
Asthma	9.9%
Arthritis	27.6%
Kidney disease	3.0%
Pulmonary disease	7.0%
Cancer	8.0%

Behavior / access	%
Smoking	16.8%
Binge drinking	19.8%
No physical activity	20.3%
Less than 7 hrs sleep	30.2%
Depression	21.6%
Fair or poor health	12.5%
Poor mental health	12.4%
Poor physical health	10.5%
No health insurance	11.7%
Visited doctor (checkup)	70.5%
Visited dentist	63.1%
Cholesterol screening	89.8%
Teeth loss	12.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	98	6.3%

Disability	%
Any disability	8.8%
Under 18	0.5%
18–64 years	2.0%
65 and over	41.3%

Health insurance coverage

Type	%
Private insurance	67.3%
Public insurance	39.8%
No insurance	5.7%
Uninsured under 19	2.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,056	92.5%
Spanish	9	0.4%
Other Indo-European	5	0.2%
Asian & Pacific Islander	4	0.2%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,182	98.2%
Born in same state	2,143	96.4%
Born in different state	1,505	67.7%
Foreign born	39	1.8%
Naturalized citizen	40	1.8%
Not a US citizen	35	87.5%

Ancestry

Ancestry	Count	%
Italian	220	9.9%
French	210	9.5%
Arab	208	9.4%
Polish	151	6.8%

Ancestry	Count	%
English	51	2.3%
Dutch	27	1.2%
German	13	0.6%

Technology access

Metric	% of households
Computer access	37.1%
Internet access	87.4%

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

Frequently asked questions about ZIP code 59436

What city is ZIP code 59436 in?

ZIP code 59436 is primarily assigned to Fairfield, Montana.

What county is ZIP code 59436 in?

ZIP code 59436 falls within Teton County, Montana.

What is the population of ZIP code 59436?

ZIP code 59436 has an estimated population of 2,222 residents, with a density of 9 people per square mile.

What is the typical home value in ZIP code 59436?

The median home value in ZIP code 59436 is $257,500.

What is the median household income in ZIP code 59436?

The median household income in ZIP code 59436 is $77,292, above the national median of ~$75,000.

What timezone is ZIP code 59436 in?

ZIP code 59436 observes the MST timezone.