59531 ZIP Code — Joplin, MT

Liberty County, Montana

ZIP code 59531 is located in Joplin, Montana, within Liberty County. It covers approximately 267.69 square miles and serves a population of 385 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 406.

About ZIP code 59531

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 $101,700. Owner-occupancy is high at 86%, well above the national average.

The gap between median ($48,500) and mean household income suggests income inequality — a small number of higher earners pull the average up. Poverty affects 22% of residents, above the national average.

The dominant occupation class is management, business, and professional, with retail trade as the leading industry. The average commute of 17 minutes is near the national average.

College attainment at 15% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (22%) compared to national benchmarks.

Overall, ZIP code 59531 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, and high homeownership.

385

population

267.69

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

59531 ZIP code map

Cities in ZIP code 59531

Below are the cities the US Postal Service accepts for ZIP code 59531. Using any city not on this list may result in mail delivery delays.

City	Status
Joplin	Preferred

Nearby ZIP codes

59530 Inverness (9.4 mi) 59522 Chester (15.8 mi) 59540 Rudyard (16.1 mi)

Demographics updated 07/2026

Population
Total population	385
Population density	1 / sq mi
State FIPS	30
County FIPS	051

Geography
Land area	267.69 sq mi
Water area	0.15 sq mi
Latitude	48.6136
Longitude	-110.8638
Timezone	Mountain (MT)
Area code	406

Total population by age

Gender

Race & ethnicity

Economics updated 07/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	41.1%	51.5%	44.2%
$50k – $100k	36.9%	26.1%	32.0%
$100k – $200k	17.7%	15.6%	19.2%
Over $200k	4.3%	6.8%	4.7%

Demographics & statistics

385

Population

People per sq mi

36.2

Median age

$48,500

Median household income

$52,890

Per capita income

$101,700

Median home value

Median monthly rent

85.7%

Home ownership

21.8%

Poverty rate

0.0%

Unemployment

186

Housing units

15.0%

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	136	35.3%
18 and over	249	64.7%
65 and over	43	11.2%
Median age	36.2 years

Race & ethnicity

White 96.4%

Hispanic or Latino 1.8%

Other race 1.8%

Group	Count	%
White	378	96.4%
Hispanic or Latino	7	1.8%
Other race	7	1.8%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	41.1%	51.5%	44.2%
$50k – $100k	36.9%	26.1%	32.0%
$100k – $200k	17.7%	15.6%	19.2%
Over $200k	4.3%	6.8%	4.7%

Under $10k 6.4%

$15k–$25k 4.3%

$25k–$35k 14.3%

$35k–$50k 27.1%

$50k–$75k 20.0%

$75k–$100k 4.3%

$100k–$150k 11.4%

$200k+ 12.1%

Range	% of households
Under $10k	6.4%
$15k–$25k	4.3%
$25k–$35k	14.3%
$35k–$50k	27.1%
$50k–$75k	20.0%
$75k–$100k	4.3%
$100k–$150k	11.4%
$200k+	12.1%
Median income	$48,500

Housing

Home values

Under $50k 30.0%

$50k–$100k 19.2%

$100k–$150k 12.5%

$150k–$200k 16.7%

$200k–$300k 21.7%

Housing overview

Metric	Value
Median home value	$101,700
Median rent / month	$0
Owner occupied	85.7%
Renter occupied	14.3%
Vacant	32.0%
Single-family detached	80.1%
Large apartment buildings	0.0%
Mobile homes	19.9%
Median rooms	6.2
Avg household size (owned)	3.04

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	7.3%
1990–1999	3.9%
1980–1989	6.8%
1970–1979	20.9%
1960–1969	9.2%
1950–1959	22.3%
1940–1949	0.0%
1939 or earlier	29.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	1.5%
2 bedrooms	31.6%
3 bedrooms	49.5%
4 bedrooms	6.3%
5+ bedrooms	11.2%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	40.0%
2 vehicles	23.6%
3 or more	36.4%

Heating fuel

Fuel type	%
Utility gas	51.4%
Electricity	17.1%
Propane / LP gas	26.4%

Households & families

Household type	Count	%
Married-couple family	57	40.7%
Cohabiting couple	5	3.6%
Male householder, no spouse	43	30.7%
Female householder, no spouse	35	25.0%
Households with children under 18	63	45.0%
Households with seniors (65+)	37	26.4%
Average household size	2.75

Marital status

Status	Male	Female
Never married	43.5%	11.1%
Married	42.2%	56.5%
Separated	2.5%	0.0%
Widowed	0.0%	10.2%
Divorced	11.8%	22.2%

Education

Less than 9th grade 1.8%

Some HS, no diploma 11.0%

HS graduate 24.2%

Some college, no degree 37.4%

Associate's degree 10.6%

Bachelor's degree 11.9%

Graduate / professional 3.1%

Metric	%
HS diploma or higher	87.2%
Bachelor's or higher	15.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	4	3.8%
Kindergarten	10	9.4%
Elementary school	71	67.0%
High school	21	19.8%
College / grad school	0	0.0%

Employment

Industry of employment

Retail trade 33.1%

Education & healthcare 30.6%

Agriculture & mining 22.3%

Construction 8.9%

Transportation & utilities 2.5%

Arts, food & hospitality 1.9%

Professional & management 0.6%

Occupation

Category	%
Management, business & arts	53.5%
Service	10.8%
Sales & office	10.8%
Natural resources & construction	13.4%
Production & transportation	11.5%

Employment type

Type	%
Private sector	80.3%
Government	0.0%
Self-employed	19.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	75.8%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	19.7%
Other means	4.5%
Avg commute (minutes)	16.8

Poverty

All people 21.8%

Under 18 years 51.5%

18 and over 5.6%

Married-couple families 0.0%

Female-led households 19.2%

Income support

Source	% of households
Social Security	27.1%
Retirement income	12.9%
Supplemental Security	4.3%
Cash public assistance	0.0%
Food stamps / SNAP	5.0%

Health indicators

Condition	%
Obesity	34.8%
High blood pressure	38.4%
High cholesterol	36.1%
Diabetes	13.8%
Heart disease	10.4%
Stroke	5.1%
Asthma	11.1%
Arthritis	36.0%
Kidney disease	4.4%
Pulmonary disease	11.6%
Cancer	9.2%

Behavior / access	%
Smoking	22.0%
Binge drinking	17.4%
No physical activity	27.2%
Less than 7 hrs sleep	30.8%
Depression	23.5%
Fair or poor health	20.2%
Poor mental health	13.6%
Poor physical health	15.2%
No health insurance	15.0%
Visited doctor (checkup)	72.1%
Visited dentist	56.0%
Cholesterol screening	89.1%
Teeth loss	20.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	11	4.4%

Disability	%
Any disability	19.7%
Under 18	5.1%
18–64 years	25.7%
65 and over	37.2%

Health insurance coverage

Type	%
Private insurance	39.2%
Public insurance	59.7%
No insurance	8.8%
Uninsured under 19	2.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	358	93.0%
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)	385	100.0%
Born in same state	385	100.0%
Born in different state	305	79.2%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Polish	52	13.5%
Arab	30	7.8%
Italian	24	6.2%

Ancestry	Count	%
English	16	4.2%
French	16	4.2%

Technology access

Metric	% of households
Computer access	36.4%
Internet access	91.4%

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

Frequently asked questions about ZIP code 59531

What city is ZIP code 59531 in?

ZIP code 59531 is primarily assigned to Joplin, Montana.

What county is ZIP code 59531 in?

ZIP code 59531 falls within Liberty County, Montana.

Is ZIP code 59531 family-oriented?

35% of residents in ZIP code 59531 are under 18, reflecting a younger, family-oriented community.

What is the poverty rate in ZIP code 59531?

22% of residents in ZIP code 59531 live below the poverty line, above the national average.

Is ZIP code 59531 mostly owner-occupied?

86% of occupied units in ZIP code 59531 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 59531?

The median home value in ZIP code 59531 is $101,700.

What timezone is ZIP code 59531 in?

ZIP code 59531 observes the MST timezone.