59323 ZIP Code — Colstrip, MT

Rosebud County, Montana

ZIP code 59323 is located in Colstrip, Montana, within Rosebud County. It covers approximately 53.35 square miles and serves a population of 2,327 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 406.

About ZIP code 59323

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $147,500. Owner-occupancy is high at 84%, well above the national average.

Median household income is $87,321.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 11 minutes is near the national average.

Educational attainment is near the national average, with 25% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 15% of civilians, above the national average of 7%.

Overall, ZIP code 59323 reflects a community defined by a strong veteran community and high homeownership.

2,327

population

53.35

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

59323 ZIP code map

Cities in ZIP code 59323

Below are the cities the US Postal Service accepts for ZIP code 59323. Using any city not on this list may result in mail delivery delays.

City	Status
Colstrip	Acceptable

Demographics updated 06/2026

Population
Total population	2,327
Population density	44 / sq mi
State FIPS	30
County FIPS	087

Geography
Land area	53.35 sq mi
Water area	0.29 sq mi
Latitude	45.9221
Longitude	-106.6851
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	27.5%	43.8%	44.2%
$50k – $100k	36.2%	34.8%	32.0%
$100k – $200k	35.7%	18.9%	19.2%
Over $200k	0.6%	2.6%	4.7%

Demographics & statistics

2,327

Population

People per sq mi

41.8

Median age

$87,321

Median household income

$40,380

Per capita income

$147,500

Median home value

$638

Median monthly rent

83.6%

Home ownership

7.6%

Poverty rate

5.0%

Unemployment

877

Housing units

24.7%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

146

10–14

147

15–19

20–24

25–34

199

35–44

199

183

45–54

184

55–59

137

60–64

138

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	692	29.7%
18 and over	1,635	70.3%
65 and over	220	9.5%
Median age	41.8 years

Race & ethnicity

White 73.2%

American Indian / Alaska Native 12.2%

Hispanic or Latino 5.3%

Two or more races 4.7%

Other race 3.3%

Asian 1.3%

Group	Count	%
White	1,799	73.2%
American Indian / Alaska Native	300	12.2%
Hispanic or Latino	130	5.3%
Two or more races	116	4.7%
Other race	81	3.3%
Asian	31	1.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	27.5%	43.8%	44.2%
$50k – $100k	36.2%	34.8%	32.0%
$100k – $200k	35.7%	18.9%	19.2%
Over $200k	0.6%	2.6%	4.7%

Under $10k 9.2%

$10k–$15k 1.6%

$25k–$35k 8.8%

$35k–$50k 11.9%

$50k–$75k 13.9%

$75k–$100k 9.4%

$100k–$150k 24.2%

$150k–$200k 13.4%

$200k+ 7.5%

Range	% of households
Under $10k	9.2%
$10k–$15k	1.6%
$25k–$35k	8.8%
$35k–$50k	11.9%
$50k–$75k	13.9%
$75k–$100k	9.4%
$100k–$150k	24.2%
$150k–$200k	13.4%
$200k+	7.5%
Median income	$87,321

Housing

Home values

Under $50k 18.3%

$50k–$100k 17.2%

$100k–$150k 15.2%

$150k–$200k 22.7%

$200k–$300k 15.9%

$300k–$500k 6.9%

$500k–$1M 3.8%

Housing overview

Metric	Value
Median home value	$147,500
Median rent / month	$638
Owner occupied	83.6%
Renter occupied	16.4%
Vacant	8.7%
Single-family detached	58.4%
Large apartment buildings	0.0%
Mobile homes	23.5%
Median rooms	6.9
Avg household size (owned)	2.56

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	14.3%
1990–1999	6.4%
1980–1989	44.6%
1970–1979	24.5%
1960–1969	7.5%
1950–1959	0.0%
1940–1949	0.0%
1939 or earlier	2.7%

Bedrooms

Size	% of units
No bedroom (studio)	2.5%
1 bedroom	7.9%
2 bedrooms	12.1%
3 bedrooms	32.7%
4 bedrooms	28.6%
5+ bedrooms	16.2%

Vehicles per household

Vehicles	% of households
No vehicle	0.6%
1 vehicle	20.0%
2 vehicles	29.3%
3 or more	50.1%

Heating fuel

Fuel type	%
Utility gas	2.9%
Electricity	49.8%
Propane / LP gas	40.1%
Fuel oil	1.5%
Wood	0.5%

Households & families

Household type	Count	%
Married-couple family	523	55.6%
Cohabiting couple	0	0.0%
Male householder, no spouse	225	23.9%
Female householder, no spouse	193	20.5%
Households with children under 18	325	34.5%
Households with seniors (65+)	163	17.3%
Average household size	2.47

Marital status

Status	Male	Female
Never married	13.2%	24.0%
Married	64.1%	60.5%
Separated	0.0%	2.2%
Widowed	6.7%	5.4%
Divorced	16.1%	7.9%

Education

Less than 9th grade 2.7%

Some HS, no diploma 1.9%

HS graduate 29.8%

Some college, no degree 26.4%

Associate's degree 14.5%

Bachelor's degree 15.4%

Graduate / professional 9.3%

Metric	%
HS diploma or higher	95.3%
Bachelor's or higher	24.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	30	4.7%
Kindergarten	47	7.4%
Elementary school	342	54.0%
High school	143	22.6%
College / grad school	71	11.2%

Employment

Industry of employment

Education & healthcare 31.8%

Agriculture & mining 23.6%

Transportation & utilities 15.5%

Construction 9.6%

Other services 4.7%

Professional & management 4.4%

Public administration 4.4%

Arts, food & hospitality 3.5%

Finance & real estate 2.5%

Occupation

Category	%
Management, business & arts	29.8%
Service	18.0%
Sales & office	11.8%
Natural resources & construction	28.6%
Production & transportation	11.8%

Employment type

Type	%
Private sector	66.0%
Government	25.7%
Self-employed	8.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	92.8%
Carpool	5.4%
Public transit	0.0%
Walk	1.1%
Work from home	0.0%
Other means	0.7%
Avg commute (minutes)	11.2

Poverty

All people 7.6%

Under 18 years 10.1%

18 and over 6.5%

Married-couple families 1.1%

Female-led households 40.8%

Income support

Source	% of households
Social Security	20.3%
Retirement income	20.5%
Supplemental Security	3.3%
Cash public assistance	1.6%
Food stamps / SNAP	1.6%

Health indicators

Condition	%
Obesity	32.6%
High blood pressure	24.9%
High cholesterol	29.7%
Diabetes	7.8%
Heart disease	4.6%
Stroke	2.2%
Asthma	9.9%
Arthritis	22.2%
Kidney disease	2.1%
Pulmonary disease	5.2%
Cancer	5.5%

Behavior / access	%
Smoking	16.5%
Binge drinking	23.6%
No physical activity	17.4%
Less than 7 hrs sleep	30.0%
Depression	22.8%
Fair or poor health	10.3%
Poor mental health	13.3%
Poor physical health	9.1%
No health insurance	10.6%
Visited doctor (checkup)	65.8%
Visited dentist	65.7%
Cholesterol screening	88.9%
Teeth loss	9.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	248	15.2%

Disability	%
Any disability	17.5%
Under 18	13.7%
18–64 years	13.1%
65 and over	57.1%

Health insurance coverage

Type	%
Private insurance	80.1%
Public insurance	23.7%
No insurance	5.2%
Uninsured under 19	6.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,167	93.1%
Spanish	31	1.4%
Other Indo-European	31	1.4%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,262	97.2%
Born in same state	2,250	96.7%
Born in different state	1,241	53.3%
Foreign born	12	0.5%
Naturalized citizen	65	2.8%
Not a US citizen	34	52.3%

Ancestry

Ancestry	Count	%
French	382	16.4%
Polish	288	12.4%
Italian	279	12%
Arab	77	3.3%

Ancestry	Count	%
Dutch	47	2%
English	44	1.9%
German	21	0.9%

Technology access

Metric	% of households
Computer access	40.4%
Internet access	91.1%

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

Frequently asked questions about ZIP code 59323

What city is ZIP code 59323 in?

ZIP code 59323 is primarily assigned to Colstrip, Montana.

What county is ZIP code 59323 in?

ZIP code 59323 falls within Rosebud County, Montana.

Is ZIP code 59323 mostly owner-occupied?

84% of occupied units in ZIP code 59323 are owner-occupied, well above the national average.

Does ZIP code 59323 have a large veteran population?

15% of civilians in ZIP code 59323 are veterans, above the national average of ~7%.

What is the typical home value in ZIP code 59323?

The median home value in ZIP code 59323 is $147,500.

What is the population of ZIP code 59323?

ZIP code 59323 has an estimated population of 2,327 residents, with a density of 44 people per square mile.

What timezone is ZIP code 59323 in?

ZIP code 59323 observes the MST timezone.