59638 ZIP Code — Jefferson City, MT

Jefferson County, Montana

ZIP code 59638 is located in Jefferson City, Montana, within Jefferson County. It covers approximately 60.41 square miles and serves a population of 594 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 406.

About ZIP code 59638

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $257,100. Owner-occupancy is high at 89%, well above the national average.

Median household income is $71,000. 50% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with public administration as the leading industry. The average commute of 27 minutes is near the national average.

Educational attainment is near the national average, with 33% of residents holding a bachelor's degree or higher.

Notable community characteristics include disability rates above the national average at 39%.

Overall, ZIP code 59638 reflects a community defined by high homeownership and a significant Social Security-dependent population.

594

population

60.41

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

59638 ZIP code map

Cities in ZIP code 59638

Below are the cities the US Postal Service accepts for ZIP code 59638. Using any city not on this list may result in mail delivery delays.

City	Status
Jefferson City	Acceptable

Demographics updated 06/2026

Population
Total population	594
Population density	10 / sq mi
State FIPS	30
County FIPS	043

Geography
Land area	60.41 sq mi
Water area	0.00 sq mi
Latitude	46.3672
Longitude	-112.1690
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	40.9%	34.6%	44.2%
$50k – $100k	45.3%	33.8%	32.0%
$100k – $200k	13.9%	28.5%	19.2%
Over $200k	0.0%	3.2%	4.7%

Demographics & statistics

594

Population

People per sq mi

41.3

Median age

$71,000

Median household income

$33,227

Per capita income

$257,100

Median home value

Median monthly rent

89.2%

Home ownership

1.7%

Poverty rate

0.0%

Unemployment

249

Housing units

32.9%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	162	27.3%
18 and over	432	72.7%
65 and over	135	22.7%
Median age	41.3 years

Race & ethnicity

White 95.3%

Two or more races 4.7%

Group	Count	%
White	566	95.3%
Two or more races	28	4.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	40.9%	34.6%	44.2%
$50k – $100k	45.3%	33.8%	32.0%
$100k – $200k	13.9%	28.5%	19.2%
Over $200k	0.0%	3.2%	4.7%

$10k–$15k 4.5%

$15k–$25k 10.8%

$35k–$50k 21.2%

$50k–$75k 16.2%

$100k–$150k 31.5%

$150k–$200k 15.8%

Range	% of households
$10k–$15k	4.5%
$15k–$25k	10.8%
$35k–$50k	21.2%
$50k–$75k	16.2%
$100k–$150k	31.5%
$150k–$200k	15.8%
Median income	$71,000

Housing

Home values

Under $50k 12.1%

$50k–$100k 3.0%

$100k–$150k 29.8%

$150k–$200k 3.0%

$200k–$300k 14.1%

$300k–$500k 8.6%

$500k–$1M 29.3%

Housing overview

Metric	Value
Median home value	$257,100
Median rent / month	$0
Owner occupied	89.2%
Renter occupied	10.8%
Vacant	18.7%
Single-family detached	85.3%
Large apartment buildings	0.0%
Mobile homes	14.7%
Median rooms	4.4
Avg household size (owned)	2.77

Year built

Era	%
2020 or later	0.0%
2010–2019	11.0%
2000–2009	25.6%
1990–1999	20.9%
1980–1989	14.3%
1970–1979	6.6%
1960–1969	0.0%
1950–1959	0.0%
1940–1949	0.0%
1939 or earlier	21.6%

Bedrooms

Size	% of units
No bedroom (studio)	3.3%
1 bedroom	10.6%
2 bedrooms	34.4%
3 bedrooms	34.1%
4 bedrooms	17.6%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	6.3%
1 vehicle	0.0%
2 vehicles	52.3%
3 or more	41.4%

Heating fuel

Fuel type	%
Utility gas	37.4%
Electricity	9.5%
Propane / LP gas	18.5%
Wood	34.7%

Households & families

Household type	Count	%
Married-couple family	171	77.0%
Cohabiting couple	6	2.7%
Male householder, no spouse	35	15.8%
Female householder, no spouse	10	4.5%
Households with children under 18	65	29.3%
Households with seniors (65+)	101	45.5%
Average household size	2.68

Marital status

Status	Male	Female
Never married	8.6%	2.4%
Married	72.7%	90.1%
Separated	0.0%	0.0%
Widowed	0.0%	4.7%
Divorced	18.6%	2.8%

Education

Less than 9th grade 8.1%

Some HS, no diploma 6.9%

HS graduate 36.0%

Some college, no degree 12.6%

Associate's degree 3.3%

Bachelor's degree 15.5%

Graduate / professional 17.4%

Metric	%
HS diploma or higher	85.0%
Bachelor's or higher	32.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	4	2.9%
Kindergarten	26	18.6%
Elementary school	98	70.0%
High school	4	2.9%
College / grad school	8	5.7%

Employment

Industry of employment

Public administration 27.2%

Construction 18.8%

Other services 16.4%

Professional & management 12.2%

Education & healthcare 9.4%

Manufacturing 5.2%

Retail trade 5.2%

Arts, food & hospitality 3.8%

Agriculture & mining 1.9%

Occupation

Category	%
Management, business & arts	35.7%
Service	11.3%
Sales & office	15.0%
Natural resources & construction	31.0%
Production & transportation	7.0%

Employment type

Type	%
Private sector	54.0%
Government	31.0%
Self-employed	13.1%
Unpaid family workers	1.9%

Commute

Method	%
Drive alone	83.4%
Carpool	1.9%
Public transit	3.8%
Walk	0.9%
Work from home	10.0%
Other means	0.0%
Avg commute (minutes)	27.4

Poverty

All people 1.7%

Under 18 years 0.0%

18 and over 2.3%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	50.0%
Retirement income	44.6%
Supplemental Security	15.3%
Cash public assistance	9.0%
Food stamps / SNAP	4.5%

Health indicators

Condition	%
Obesity	31.2%
High blood pressure	31.2%
High cholesterol	33.5%
Diabetes	10.6%
Heart disease	6.9%
Stroke	3.3%
Asthma	10.1%
Arthritis	27.8%
Kidney disease	3.0%
Pulmonary disease	7.4%
Cancer	7.4%

Behavior / access	%
Smoking	18.7%
Binge drinking	20.8%
No physical activity	21.3%
Less than 7 hrs sleep	30.4%
Depression	21.9%
Fair or poor health	13.8%
Poor mental health	12.5%
Poor physical health	11.3%
No health insurance	11.2%
Visited doctor (checkup)	71.2%
Visited dentist	62.9%
Cholesterol screening	90.5%
Teeth loss	12.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	43	10.0%

Disability	%
Any disability	39.1%
Under 18	53.7%
18–64 years	35.4%
65 and over	29.6%

Health insurance coverage

Type	%
Private insurance	71.9%
Public insurance	61.3%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	556	93.6%
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)	592	99.7%
Born in same state	592	99.7%
Born in different state	258	43.4%
Foreign born	0	0.0%
Naturalized citizen	2	0.3%
Not a US citizen	2	100.0%

Ancestry

Ancestry	Count	%
French	161	27.1%
Dutch	105	17.7%
Italian	65	10.9%

Ancestry	Count	%
Polish	40	6.7%
Irish	11	1.9%
Arab	2	0.3%

Technology access

Metric	% of households
Computer access	37.4%
Internet access	89.2%

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

Frequently asked questions about ZIP code 59638

What city is ZIP code 59638 in?

ZIP code 59638 is primarily assigned to Jefferson City, Montana.

What county is ZIP code 59638 in?

ZIP code 59638 falls within Jefferson County, Montana.

Does ZIP code 59638 have a large retiree population?

50% of households in ZIP code 59638 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 59638 mostly owner-occupied?

89% of occupied units in ZIP code 59638 are owner-occupied, well above the national average.

Does ZIP code 59638 have a large veteran population?

10% of civilians in ZIP code 59638 are veterans, above the national average of ~7%.

What is the population of ZIP code 59638?

ZIP code 59638 has an estimated population of 594 residents, with a density of 10 people per square mile.

What timezone is ZIP code 59638 in?

ZIP code 59638 observes the MST timezone.