59275 ZIP Code — Westby, MT

Sheridan County, Montana

ZIP code 59275 is located in Westby, Montana, within Sheridan County. It covers approximately 376.35 square miles and serves a population of 559 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 406.

About ZIP code 59275

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 $82,800. Owner-occupancy is high at 90%, well above the national average.

Median household income is $67,083. The poverty rate of 5% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 23 minutes is near the national average.

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

32% of residents lack health insurance, above the national average.

559

population

376.35

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

59275 ZIP code map

Cities in ZIP code 59275

Below are the cities the US Postal Service accepts for ZIP code 59275. Using any city not on this list may result in mail delivery delays.

City	Status
Westby	Preferred

Nearby ZIP codes

59211 Antelope (14.5 mi) 59254 Plentywood (16.2 mi) 58844 Fortuna (19.7 mi) 58845 Grenora (20 mi)

Demographics updated 06/2026

Population
Total population	559
Population density	1 / sq mi
State FIPS	30
County FIPS	091

Geography
Land area	376.35 sq mi
Water area	14.34 sq mi
Latitude	48.8522
Longitude	-104.2218
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	38.1%	43.9%	44.2%
$50k – $100k	41.6%	31.9%	32.0%
$100k – $200k	15.7%	18.0%	19.2%
Over $200k	4.6%	6.2%	4.7%

Demographics & statistics

559

Population

People per sq mi

49.1

Median age

$67,083

Median household income

$31,543

Per capita income

$82,800

Median home value

$583

Median monthly rent

89.7%

Home ownership

4.7%

Poverty rate

0.0%

Unemployment

255

Housing units

26.2%

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

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	137	24.5%
18 and over	422	75.5%
65 and over	104	18.6%
Median age	49.1 years

Race & ethnicity

White 98.6%

Two or more races 0.7%

Hispanic or Latino 0.4%

Asian 0.2%

American Indian / Alaska Native 0.2%

Group	Count	%
White	553	98.6%
Two or more races	4	0.7%
Hispanic or Latino	2	0.4%
Asian	1	0.2%
American Indian / Alaska Native	1	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	38.1%	43.9%	44.2%
$50k – $100k	41.6%	31.9%	32.0%
$100k – $200k	15.7%	18.0%	19.2%
Over $200k	4.6%	6.2%	4.7%

Under $10k 1.6%

$10k–$15k 2.7%

$15k–$25k 17.3%

$25k–$35k 5.9%

$35k–$50k 9.2%

$50k–$75k 27.0%

$75k–$100k 12.4%

$100k–$150k 16.2%

$150k–$200k 1.1%

$200k+ 6.5%

Range	% of households
Under $10k	1.6%
$10k–$15k	2.7%
$15k–$25k	17.3%
$25k–$35k	5.9%
$35k–$50k	9.2%
$50k–$75k	27.0%
$75k–$100k	12.4%
$100k–$150k	16.2%
$150k–$200k	1.1%
$200k+	6.5%
Median income	$67,083

Housing

Home values

Under $50k 22.3%

$50k–$100k 37.3%

$100k–$150k 23.5%

$150k–$200k 5.4%

$200k–$300k 9.6%

$300k–$500k 1.8%

Housing overview

Metric	Value
Median home value	$82,800
Median rent / month	$583
Owner occupied	89.7%
Renter occupied	10.3%
Vacant	32.5%
Single-family detached	76.6%
Large apartment buildings	0.0%
Mobile homes	16.8%
Median rooms	5.7
Avg household size (owned)	3.10

Year built

Era	%
2020 or later	0.0%
2010–2019	7.7%
2000–2009	3.3%
1990–1999	0.7%
1980–1989	12.8%
1970–1979	18.6%
1960–1969	16.8%
1950–1959	3.3%
1940–1949	11.7%
1939 or earlier	25.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	9.9%
2 bedrooms	24.8%
3 bedrooms	40.9%
4 bedrooms	14.2%
5+ bedrooms	9.5%

Vehicles per household

Vehicles	% of households
No vehicle	2.7%
1 vehicle	9.2%
2 vehicles	36.2%
3 or more	51.9%

Heating fuel

Fuel type	%
Electricity	44.3%
Propane / LP gas	44.3%
Fuel oil	1.6%
Wood	9.7%

Households & families

Household type	Count	%
Married-couple family	107	57.8%
Cohabiting couple	22	11.9%
Male householder, no spouse	45	24.3%
Female householder, no spouse	11	5.9%
Households with children under 18	45	24.3%
Households with seniors (65+)	64	34.6%
Average household size	3.02

Marital status

Status	Male	Female
Never married	35.8%	19.4%
Married	44.2%	44.2%
Separated	2.3%	0.5%
Widowed	4.7%	3.7%
Divorced	13.0%	32.3%

Education

Less than 9th grade 0.2%

Some HS, no diploma 2.7%

HS graduate 40.9%

Some college, no degree 23.4%

Associate's degree 6.5%

Bachelor's degree 15.2%

Graduate / professional 11.0%

Metric	%
HS diploma or higher	97.0%
Bachelor's or higher	26.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	2	4.3%
Kindergarten	7	15.2%
Elementary school	10	21.7%
High school	25	54.3%
College / grad school	2	4.3%

Employment

Industry of employment

Education & healthcare 48.5%

Agriculture & mining 28.6%

Arts, food & hospitality 9.0%

Construction 4.5%

Wholesale trade 2.3%

Other services 1.9%

Professional & management 1.5%

Manufacturing 1.1%

Transportation & utilities 1.1%

Retail trade 0.8%

Information 0.8%

Occupation

Category	%
Management, business & arts	41.0%
Service	28.2%
Sales & office	12.8%
Natural resources & construction	8.3%
Production & transportation	9.8%

Employment type

Type	%
Private sector	72.6%
Government	11.3%
Self-employed	16.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	80.8%
Carpool	6.1%
Public transit	0.0%
Walk	8.0%
Work from home	5.0%
Other means	0.0%
Avg commute (minutes)	22.8

Poverty

All people 4.7%

Under 18 years 3.6%

18 and over 5.0%

Married-couple families 2.8%

Female-led households 0.0%

Income support

Source	% of households
Social Security	28.6%
Retirement income	21.1%
Supplemental Security	1.1%
Cash public assistance	1.6%
Food stamps / SNAP	4.3%

Health indicators

Condition	%
Obesity	31.4%
High blood pressure	36.8%
High cholesterol	35.9%
Diabetes	11.9%
Heart disease	8.8%
Stroke	3.9%
Asthma	9.7%
Arthritis	30.3%
Kidney disease	3.6%
Pulmonary disease	8.2%
Cancer	8.9%

Behavior / access	%
Smoking	17.6%
Binge drinking	19.6%
No physical activity	24.4%
Less than 7 hrs sleep	30.4%
Depression	19.9%
Fair or poor health	14.4%
Poor mental health	11.9%
Poor physical health	11.7%
No health insurance	10.6%
Visited doctor (checkup)	72.4%
Visited dentist	63.6%
Cholesterol screening	91.6%
Teeth loss	13.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	28	6.6%

Disability	%
Any disability	4.8%
Under 18	0.0%
18–64 years	2.8%
65 and over	17.3%

Health insurance coverage

Type	%
Private insurance	51.5%
Public insurance	26.7%
No insurance	32.0%
Uninsured under 19	64.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	469	83.9%
Spanish	2	0.4%
Other Indo-European	2	0.4%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	553	98.9%
Born in same state	502	89.8%
Born in different state	258	46.2%
Foreign born	51	9.1%
Naturalized citizen	6	1.1%
Not a US citizen	1	16.7%

Ancestry

Ancestry	Count	%
Polish	146	26.1%
French	106	19%
Dutch	50	8.9%

Ancestry	Count	%
Italian	11	2%
Irish	1	0.2%

Technology access

Metric	% of households
Computer access	33.1%
Internet access	89.7%

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

Frequently asked questions about ZIP code 59275

What city is ZIP code 59275 in?

ZIP code 59275 is primarily assigned to Westby, Montana.

What county is ZIP code 59275 in?

ZIP code 59275 falls within Sheridan County, Montana.

Is ZIP code 59275 mostly owner-occupied?

90% of occupied units in ZIP code 59275 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 59275?

The median home value in ZIP code 59275 is $82,800.

What is the population of ZIP code 59275?

ZIP code 59275 has an estimated population of 559 residents, with a density of 1 people per square mile.

What is the median household income in ZIP code 59275?

The median household income in ZIP code 59275 is $67,083, below the national median of ~$75,000.

What timezone is ZIP code 59275 in?

ZIP code 59275 observes the MST timezone.