59011 ZIP Code — Big Timber, MT

Sweet Grass County, Montana

ZIP code 59011 is located in Big Timber, Montana, within Sweet Grass County. It covers approximately 936.36 square miles and serves a population of 3,148 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 406.

About ZIP code 59011

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 $264,900. Owner-occupancy is high at 75%, well above the national average.

Median household income is $63,397. The poverty rate of 6% is below the national average. 40% 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 23 minutes is near the national average.

Educational attainment is near the national average, with 24% of residents holding a bachelor's degree or higher.

Overall, ZIP code 59011 reflects a community defined by high homeownership and a significant Social Security-dependent population.

3,148

population

936.36

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

59011 ZIP code map

Cities in ZIP code 59011

Below are the cities the US Postal Service accepts for ZIP code 59011. Using any city not on this list may result in mail delivery delays.

City	Status
Big Timber	Preferred

Nearby ZIP codes

59055 Melville (16.9 mi) 59033 Greycliff (17.3 mi)

Demographics updated 06/2026

Population
Total population	3,148
Population density	3 / sq mi
State FIPS	30
County FIPS	097

Geography
Land area	936.36 sq mi
Water area	4.38 sq mi
Latitude	45.9252
Longitude	-109.9388
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	44.5%	43.0%	44.2%
$50k – $100k	40.5%	41.4%	32.0%
$100k – $200k	13.7%	13.4%	19.2%
Over $200k	1.2%	2.2%	4.7%

Demographics & statistics

3,148

Population

People per sq mi

43.2

Median age

$63,397

Median household income

$35,094

Per capita income

$264,900

Median home value

$813

Median monthly rent

75.3%

Home ownership

5.8%

Poverty rate

2.4%

Unemployment

1,180

Housing units

23.6%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

110

10–14

105

108

15–19

104

125

20–24

120

182

25–34

175

167

35–44

161

164

45–54

158

55–59

119

60–64

115

220

65–74

211

128

75–84

123

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	626	19.9%
18 and over	2,522	80.1%
65 and over	773	24.6%
Median age	43.2 years

Race & ethnicity

White 91.8%

Two or more races 2.8%

Black or African American 1.8%

Hispanic or Latino 1.7%

American Indian / Alaska Native 1.2%

Other race 0.7%

Group	Count	%
White	2,940	91.8%
Two or more races	89	2.8%
Black or African American	57	1.8%
Hispanic or Latino	53	1.7%
American Indian / Alaska Native	38	1.2%
Other race	24	0.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	44.5%	43.0%	44.2%
$50k – $100k	40.5%	41.4%	32.0%
$100k – $200k	13.7%	13.4%	19.2%
Over $200k	1.2%	2.2%	4.7%

Under $10k 3.8%

$10k–$15k 3.9%

$15k–$25k 6.6%

$25k–$35k 7.3%

$35k–$50k 13.3%

$50k–$75k 23.9%

$75k–$100k 16.3%

$100k–$150k 16.5%

$150k–$200k 4.4%

$200k+ 3.9%

Range	% of households
Under $10k	3.8%
$10k–$15k	3.9%
$15k–$25k	6.6%
$25k–$35k	7.3%
$35k–$50k	13.3%
$50k–$75k	23.9%
$75k–$100k	16.3%
$100k–$150k	16.5%
$150k–$200k	4.4%
$200k+	3.9%
Median income	$63,397

Housing

Home values

Under $50k 3.2%

$50k–$100k 3.4%

$100k–$150k 10.4%

$150k–$200k 18.9%

$200k–$300k 23.6%

$300k–$500k 27.9%

$500k–$1M 7.2%

$1M+ 5.4%

Housing overview

Metric	Value
Median home value	$264,900
Median rent / month	$813
Owner occupied	75.3%
Renter occupied	24.7%
Vacant	17.5%
Single-family detached	81.2%
Large apartment buildings	0.0%
Mobile homes	8.0%
Median rooms	5.7
Avg household size (owned)	2.49

Year built

Era	%
2020 or later	0.0%
2010–2019	5.0%
2000–2009	11.3%
1990–1999	18.2%
1980–1989	11.8%
1970–1979	17.1%
1960–1969	4.6%
1950–1959	5.8%
1940–1949	6.3%
1939 or earlier	20.0%

Bedrooms

Size	% of units
No bedroom (studio)	1.3%
1 bedroom	6.7%
2 bedrooms	26.0%
3 bedrooms	43.7%
4 bedrooms	13.4%
5+ bedrooms	8.8%

Vehicles per household

Vehicles	% of households
No vehicle	3.7%
1 vehicle	15.2%
2 vehicles	34.0%
3 or more	47.1%

Heating fuel

Fuel type	%
Utility gas	48.0%
Electricity	16.0%
Propane / LP gas	16.1%
Fuel oil	0.8%
Wood	17.5%

Households & families

Household type	Count	%
Married-couple family	729	59.7%
Cohabiting couple	33	2.7%
Male householder, no spouse	218	17.8%
Female householder, no spouse	242	19.8%
Households with children under 18	324	26.5%
Households with seniors (65+)	488	39.9%
Average household size	2.56

Marital status

Status	Male	Female
Never married	27.6%	21.5%
Married	60.1%	61.1%
Separated	0.4%	0.0%
Widowed	2.8%	7.5%
Divorced	9.1%	9.9%

Education

Less than 9th grade 0.1%

Some HS, no diploma 2.9%

HS graduate 32.6%

Some college, no degree 30.9%

Associate's degree 9.8%

Bachelor's degree 16.9%

Graduate / professional 6.7%

Metric	%
HS diploma or higher	96.9%
Bachelor's or higher	23.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	49	7.1%
Kindergarten	15	2.2%
Elementary school	235	34.2%
High school	209	30.4%
College / grad school	179	26.1%

Employment

Industry of employment

Education & healthcare 17.1%

Construction 15.9%

Agriculture & mining 14.7%

Retail trade 11.3%

Transportation & utilities 8.0%

Professional & management 7.8%

Manufacturing 5.7%

Other services 4.9%

Finance & real estate 4.4%

Arts, food & hospitality 3.5%

Public administration 2.9%

Information 1.9%

Wholesale trade 1.7%

Occupation

Category	%
Management, business & arts	32.0%
Service	14.6%
Sales & office	13.5%
Natural resources & construction	26.3%
Production & transportation	13.5%

Employment type

Type	%
Private sector	74.9%
Government	13.9%
Self-employed	11.0%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	77.5%
Carpool	8.3%
Public transit	2.9%
Walk	3.6%
Work from home	6.6%
Other means	1.0%
Avg commute (minutes)	23.0

Poverty

All people 5.8%

Under 18 years 4.5%

18 and over 6.1%

Married-couple families 0.4%

Female-led households 20.0%

Income support

Source	% of households
Social Security	40.4%
Retirement income	21.2%
Supplemental Security	2.0%
Cash public assistance	0.0%
Food stamps / SNAP	4.8%

Health indicators

Condition	%
Obesity	30.3%
High blood pressure	32.7%
High cholesterol	33.6%
Diabetes	9.8%
Heart disease	7.6%
Stroke	3.4%
Asthma	9.4%
Arthritis	30.0%
Kidney disease	3.2%
Pulmonary disease	7.1%
Cancer	8.5%

Behavior / access	%
Smoking	16.2%
Binge drinking	19.6%
No physical activity	20.3%
Less than 7 hrs sleep	29.9%
Depression	21.1%
Fair or poor health	12.8%
Poor mental health	12.0%
Poor physical health	10.7%
No health insurance	11.1%
Visited doctor (checkup)	72.3%
Visited dentist	65.5%
Cholesterol screening	90.5%
Teeth loss	13.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	229	9.1%

Disability	%
Any disability	13.9%
Under 18	1.9%
18–64 years	9.2%
65 and over	34.7%

Health insurance coverage

Type	%
Private insurance	73.8%
Public insurance	36.3%
No insurance	8.6%
Uninsured under 19	5.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,967	94.3%
Spanish	12	0.4%
Other Indo-European	12	0.4%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,132	99.5%
Born in same state	3,108	98.7%
Born in different state	1,874	59.5%
Foreign born	24	0.8%
Naturalized citizen	16	0.5%
Not a US citizen	11	68.8%

Ancestry

Ancestry	Count	%
Polish	549	17.4%
French	512	16.3%
Italian	335	10.6%
English	60	1.9%

Ancestry	Count	%
Arab	38	1.2%
Dutch	33	1%
Irish	22	0.7%
German	10	0.3%

Technology access

Metric	% of households
Computer access	38.8%
Internet access	91.3%

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

Frequently asked questions about ZIP code 59011

What city is ZIP code 59011 in?

ZIP code 59011 is primarily assigned to Big Timber, Montana.

What county is ZIP code 59011 in?

ZIP code 59011 falls within Sweet Grass County, Montana.

Does ZIP code 59011 have a large retiree population?

40% of households in ZIP code 59011 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 59011 have a large veteran population?

9% of civilians in ZIP code 59011 are veterans, above the national average of ~7%.

What is the population of ZIP code 59011?

ZIP code 59011 has an estimated population of 3,148 residents, with a density of 3 people per square mile.

What is the median household income in ZIP code 59011?

The median household income in ZIP code 59011 is $63,397, below the national median of ~$75,000.

What timezone is ZIP code 59011 in?

ZIP code 59011 observes the MST timezone.