Ismay ZIP Code List — Custer County, MT

There is one unique ZIP code in Ismay, Montana and it is 59336. Area code: 406.

ZIP codes

1,046.99

sq mi land

0.69

sq mi water

406

area code

Ismay, MT ZIP code map

About Ismay, MT

Ismay, Montana, is a small, picturesque city located within the expansive landscapes of Custer County. Known for its serene surroundings, Ismay offers a glimpse into rural life in the Treasure State. With its stunning vistas and close-knit community, it serves as a peaceful retreat for visitors and residents alike.

Location & geography

Ismay is situated in the southeastern part of Montana, surrounded by rolling plains and wide-open spaces. Nearby cities include Miles City, located approximately 61 miles to the northwest, and Baker, which is about 43 miles to the northeast. The city covers a vast land area of 1,046.99 square miles, with a small water area of 0.69 square miles, contributing to its predominantly dry terrain.

Community & economy

The character of Ismay is defined by its rural charm and a strong sense of community among its residents. The local economy historically thrived on agriculture, and although the population is small, the spirit of neighborliness is palpable. Daily life in Ismay revolves around community events, outdoor activities, and a connection to the natural beauty of the land.

Transportation

Ismay is accessible primarily via U.S. Highway 12, which connects it to larger cities for commerce and travel. The nearest named airports are in Miles City and Baker, providing essential transportation links for residents and visitors. Public transit options are limited, emphasizing the independent lifestyle characteristic of this rural community.

History

Ismay was founded in the early 20th century and was named after the daughter of a railroad executive, reflecting its historical ties to the railway industry. The city developed as a hub for local agriculture, with ranching being a core component of its economy. Over the years, Ismay has seen various notable events, including community gatherings that highlight its rich cultural heritage.

Did you know?

One surprising fact about Ismay is that it features a historic train depot, which stands as a testament to its rich railroad history. Additionally, Ismay is known for being home to a famous local landmark, the 'Ismay Post Office,' which adds to its unique small-town charm.

ZIP codes for Ismay, MT (1)

ZIP code	City	County	Map
59336	Ismay	Custer	View map

Demographics & statistics

222

Population

43.5

Median age

$60,625

Median household income

$33,700

Per capita income

$277,300

Median home value

Median monthly rent

84.6%

Home ownership

2.7%

Poverty rate

6.1%

Unemployment

Housing units

37.9%

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

65–74

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	70	31.5%
18 and over	152	68.5%
65 and over	32	14.4%
Median age	43.5 years

Race & ethnicity

White 99.1%

Hispanic or Latino 0.4%

Other race 0.4%

Group	Count	%
White	221	99.1%
Hispanic or Latino	1	0.4%
Other race	1	0.4%

Household income

$10k–$15k 5.1%

$15k–$25k 7.7%

$25k–$35k 11.5%

$35k–$50k 7.7%

$50k–$75k 29.5%

$75k–$100k 14.1%

$100k–$150k 5.1%

$150k–$200k 9.0%

$200k+ 10.3%

Range	% of households
$10k–$15k	5.1%
$15k–$25k	7.7%
$25k–$35k	11.5%
$35k–$50k	7.7%
$50k–$75k	29.5%
$75k–$100k	14.1%
$100k–$150k	5.1%
$150k–$200k	9.0%
$200k+	10.3%
Median income	$60,625

Housing

Home values

Under $50k 3.0%

$50k–$100k 7.6%

$100k–$150k 15.2%

$150k–$200k 1.5%

$200k–$300k 30.3%

$300k–$500k 22.7%

$500k–$1M 13.6%

$1M+ 6.1%

Housing overview

Metric	Value
Median home value	$277,300
Median rent / month	$0
Owner occupied	84.6%
Renter occupied	15.4%
Vacant	27.8%
Single-family detached	81.5%
Large apartment buildings	0.0%
Mobile homes	16.7%
Median rooms	6.8
Avg household size (owned)	2.89

Year built

Era	%
2020 or later	0.0%
2010–2019	13.0%
2000–2009	4.6%
1990–1999	13.9%
1980–1989	4.6%
1970–1979	10.2%
1960–1969	13.0%
1950–1959	15.7%
1940–1949	9.3%
1939 or earlier	15.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	24.1%
3 bedrooms	34.3%
4 bedrooms	28.7%
5+ bedrooms	13.0%

Vehicles per household

Vehicles	% of households
No vehicle	2.6%
1 vehicle	19.2%
2 vehicles	17.9%
3 or more	60.3%

Heating fuel

Fuel type	%
Electricity	2.6%
Propane / LP gas	75.6%
Wood	11.5%

Households & families

Household type	Count	%
Married-couple family	65	83.3%
Cohabiting couple	0	0.0%
Male householder, no spouse	9	11.5%
Female householder, no spouse	4	5.1%
Households with children under 18	25	32.1%
Households with seniors (65+)	26	33.3%
Average household size	2.85

Marital status

Status	Male	Female
Never married	13.5%	26.1%
Married	78.7%	73.9%
Separated	0.0%	0.0%
Widowed	4.5%	0.0%
Divorced	3.4%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 0.7%

HS graduate 17.2%

Some college, no degree 22.1%

Associate's degree 22.1%

Bachelor's degree 35.9%

Graduate / professional 2.1%

Metric	%
HS diploma or higher	99.3%
Bachelor's or higher	37.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	6	10.3%
Kindergarten	1	1.7%
Elementary school	25	43.1%
High school	26	44.8%
College / grad school	0	0.0%

Employment

Industry of employment

Agriculture & mining 71.3%

Education & healthcare 12.0%

Construction 10.2%

Transportation & utilities 1.9%

Professional & management 1.9%

Public administration 1.9%

Other services 0.9%

Occupation

Category	%
Management, business & arts	59.3%
Service	6.5%
Sales & office	12.0%
Natural resources & construction	13.0%
Production & transportation	9.3%

Employment type

Type	%
Private sector	58.3%
Government	8.3%
Self-employed	27.8%
Unpaid family workers	5.6%

Commute

Method	%
Drive alone	44.4%
Carpool	0.0%
Public transit	0.0%
Walk	24.1%
Other means	0.0%
Avg commute (minutes)	16.6

Poverty

All people 2.7%

Under 18 years 0.0%

18 and over 3.9%

Married-couple families 4.6%

Female-led households 0.0%

Income support

Source	% of households
Social Security	25.6%
Retirement income	25.6%
Supplemental Security	0.0%
Cash public assistance	2.6%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
High blood pressure	30.0%
High cholesterol	31.5%
Heart disease	6.8%
Stroke	3.0%
Asthma	9.4%
Arthritis	26.3%
Kidney disease	2.8%
Pulmonary disease	6.0%
Cancer	7.8%

Behavior / access	%
Binge drinking	21.8%
No physical activity	18.9%
Less than 7 hrs sleep	30.3%
Fair or poor health	11.1%
Poor mental health	11.8%
Poor physical health	9.6%
No health insurance	10.1%
Visited doctor (checkup)	70.4%
Visited dentist	68.5%
Cholesterol screening	90.3%
Teeth loss	11.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	3	2.0%

Disability	%
Any disability	7.2%
Under 18	0.0%
18–64 years	10.8%
65 and over	9.4%

Health insurance coverage

Type	%
Private insurance	63.5%
Public insurance	37.4%
Uninsured under 19	10.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	208	93.7%
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)	220	99.1%
Born in same state	216	97.3%
Born in different state	179	80.6%
Foreign born	4	1.8%
Naturalized citizen	2	0.9%
Not a US citizen	2	100.0%

Ancestry

Ancestry	Count	%
Italian	48	21.6%
Polish	33	14.9%
French	14	6.3%

Ancestry	Count	%
Arab	12	5.4%
Dutch	2	0.9%

Technology access

Metric	% of households
Computer access	35.1%
Internet access	84.6%

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

Frequently asked questions

What is the ZIP code for Ismay, MT?

Ismay, MT has one ZIP code: 59336.

What is the main ZIP code for Ismay, MT?

The primary ZIP code for Ismay, MT is 59336. The city uses area code 406 for phone service.

What county is Ismay, MT in?

Ismay is located in Custer County, Montana.

How many ZIP codes are in Ismay, MT?

Ismay, MT has 1 ZIP code.

What ZIP code should I use when mailing correspondence to businesses in downtown Ismay, Montana?

All mail sent to Ismay businesses and residents uses ZIP code 59336, as this is the only ZIP code serving the entire community in Custer County.

If I'm sending a package to someone in the Ismay area near the community center, what ZIP code do I need?

You will need to use ZIP code 59336 for any addresses in Ismay, regardless of the specific location within the town, as the entire municipality is served by this single ZIP code.