Jefferson County, MT ZIP Codes
Montana (MT) · 6 ZIP codes · 6 cities
6
ZIP codes
12,470
population (2021)
+9.3%
pop change since 2010
30043
FIPS code
Jefferson County ZIP code map
About Jefferson County
Jefferson County is located in Montana and contains 6 ZIP codes across 6 cities and communities.
The county's population was 12,470 as of 2021,
an increase of
9.3% from 11,406 in 2010.
The timezone is Pacific Time (observes DST).
The Federal Information Processing System (FIPS) code for Jefferson County is 30043.
| Population | |
|---|---|
| 2021 population | 12,470 |
| 2010 population | 11,406 |
| Change | +9.3% |
| County details | |
|---|---|
| State | Montana |
| FIPS code | 30043 |
| Timezone | Pacific |
| Daylight saving | Yes |
Cities in Jefferson County
ZIP codes for Jefferson County, MT (6)
| ZIP code | City | County | Map |
|---|---|---|---|
| 59631 | Basin | Jefferson | View map |
| 59632 | Boulder | Jefferson | View map |
| 59634 | Clancy | Jefferson | View map |
| 59638 | Jefferson City | Jefferson | View map |
| 59721 | Cardwell | Jefferson | View map |
| 59759 | Whitehall | Jefferson | View map |
Demographics & statistics
11,776
Population
48.1
Median age
$81,735
Median household income
$40,111
Per capita income
$362,025
Median home value
$903
Median monthly rent
79.7%
Home ownership
5.1%
Poverty rate
3.3%
Unemployment
4,387
Housing units
32.4%
Bachelor's or higher
Age distribution
Male
Female
283
Under 5
256
315
5–9
285
352
10–14
318
396
15–19
357
286
20–24
259
550
25–34
497
680
35–44
614
826
45–54
745
519
55–59
469
583
60–64
527
945
65–74
854
376
75–84
339
76
85+
69
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 2,334 | 18.8% |
| 18 and over | 9,442 | 81.2% |
| 65 and over | 2,659 | 23.6% |
| Median age | 48.1 years | |
Race & ethnicity
White
90.1%
Two or more races
5.2%
Hispanic or Latino
2.3%
American Indian / Alaska Native
1.3%
Other race
0.6%
Black or African American
0.3%
Asian
0.2%
| Group | Count | % |
|---|---|---|
| White | 10,860 | 90.1% |
| Two or more races | 627 | 5.2% |
| Hispanic or Latino | 277 | 2.3% |
| American Indian / Alaska Native | 153 | 1.3% |
| Other race | 75 | 0.6% |
| Black or African American | 33 | 0.3% |
| Asian | 28 | 0.2% |
Household income
Under $10k
2.8%
$10k–$15k
1.2%
$15k–$25k
6.8%
$25k–$35k
6.6%
$35k–$50k
12.5%
$50k–$75k
22.0%
$75k–$100k
11.2%
$100k–$150k
18.2%
$150k–$200k
7.8%
$200k+
11.0%
| Range | % of households |
|---|---|
| Under $10k | 2.8% |
| $10k–$15k | 1.2% |
| $15k–$25k | 6.8% |
| $25k–$35k | 6.6% |
| $35k–$50k | 12.5% |
| $50k–$75k | 22.0% |
| $75k–$100k | 11.2% |
| $100k–$150k | 18.2% |
| $150k–$200k | 7.8% |
| $200k+ | 11.0% |
| Median income | $81,735 |
Housing
Home values
Under $50k
3.5%
$50k–$100k
3.9%
$100k–$150k
5.1%
$150k–$200k
12.5%
$200k–$300k
17.7%
$300k–$500k
31.2%
$500k–$1M
23.2%
$1M+
3.0%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $362,025 |
| Median rent / month | $903 |
| Owner occupied | 79.7% |
| Renter occupied | 20.3% |
| Vacant | 14.8% |
| Single-family detached | 81.8% |
| Large apartment buildings | 0.5% |
| Mobile homes | 12.5% |
| Median rooms | 6.3 |
| Avg household size (owned) | 2.48 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.9% |
| 2010–2019 | 9.5% |
| 2000–2009 | 17.0% |
| 1990–1999 | 17.6% |
| 1980–1989 | 11.2% |
| 1970–1979 | 16.6% |
| 1960–1969 | 6.4% |
| 1950–1959 | 4.7% |
| 1940–1949 | 4.2% |
| 1939 or earlier | 12.0% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.5% |
| 1 bedroom | 9.8% |
| 2 bedrooms | 18.6% |
| 3 bedrooms | 42.4% |
| 4 bedrooms | 19.3% |
| 5+ bedrooms | 7.7% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 2.5% |
| 1 vehicle | 15.9% |
| 2 vehicles | 29.6% |
| 3 or more | 52.1% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 37.2% |
| Electricity | 14.7% |
| Propane / LP gas | 26.0% |
| Fuel oil | 0.1% |
| Wood | 20.8% |
| Solar | 0.2% |
| No fuel used | 0.4% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 3,069 | 66.8% |
| Cohabiting couple | 162 | 3.8% |
| Male householder, no spouse | 630 | 14.8% |
| Female householder, no spouse | 682 | 14.6% |
| Households with children under 18 | 1,283 | 25.7% |
| Households with seniors (65+) | 1,738 | 39.4% |
| Average household size | 2.48 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 23.3% | 16.2% |
| Married | 63.3% | 65.3% |
| Separated | 1.3% | 1.2% |
| Widowed | 2.1% | 8.9% |
| Divorced | 10.1% | 8.5% |
Education
Less than 9th grade
2.4%
Some HS, no diploma
3.0%
HS graduate
27.1%
Some college, no degree
24.7%
Associate's degree
10.7%
Bachelor's degree
22.8%
Graduate / professional
9.6%
| Metric | % |
|---|---|
| HS diploma or higher | 94.7% |
| Bachelor's or higher | 32.4% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 120 | 4.7% |
| Kindergarten | 180 | 7.2% |
| Elementary school | 963 | 43.6% |
| High school | 694 | 26.9% |
| College / grad school | 373 | 17.6% |
Employment
Industry of employment
Education & healthcare
22.0%
Agriculture & mining
15.0%
Retail trade
11.6%
Construction
10.4%
Professional & management
8.5%
Public administration
8.2%
Manufacturing
6.0%
Arts, food & hospitality
5.4%
Transportation & utilities
4.6%
Other services
3.6%
Finance & real estate
2.9%
Information
1.3%
Wholesale trade
0.6%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 41.2% |
| Service | 13.1% |
| Sales & office | 15.4% |
| Natural resources & construction | 19.8% |
| Production & transportation | 10.5% |
Employment type
| Type | % |
|---|---|
| Private sector | 66.1% |
| Government | 21.2% |
| Self-employed | 10.0% |
| Unpaid family workers | 2.8% |
Commute
| Method | % |
|---|---|
| Drive alone | 68.0% |
| Carpool | 13.5% |
| Public transit | 0.3% |
| Walk | 2.9% |
| Other means | 0.5% |
| Avg commute (minutes) | 26.1 |
Poverty
All people
5.1%
Under 18 years
5.3%
18 and over
5.1%
Married-couple families
0.9%
Female-led households
10.1%
Income support
| Source | % of households |
|---|---|
| Social Security | 45.1% |
| Retirement income | 33.3% |
| Supplemental Security | 4.0% |
| Cash public assistance | 3.7% |
| Food stamps / SNAP | 4.6% |
Health indicators
| Condition | % |
|---|---|
| High blood pressure | 30.1% |
| High cholesterol | 33.0% |
| Heart disease | 6.6% |
| Stroke | 3.0% |
| Asthma | 9.8% |
| Arthritis | 26.8% |
| Kidney disease | 2.9% |
| Pulmonary disease | 6.7% |
| Cancer | 7.5% |
| Behavior / access | % |
|---|---|
| Binge drinking | 21.2% |
| No physical activity | 19.7% |
| Less than 7 hrs sleep | 29.6% |
| Fair or poor health | 12.2% |
| Poor mental health | 12.1% |
| Poor physical health | 10.5% |
| No health insurance | 10.3% |
| Visited doctor (checkup) | 71.2% |
| Visited dentist | 65.4% |
| Cholesterol screening | 90.5% |
| Teeth loss | 11.6% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,111 | 11.0% |
| Disability | % |
|---|---|
| Any disability | 16.0% |
| Under 18 | 2.0% |
| 18–64 years | 14.5% |
| 65 and over | 32.7% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 70.7% |
| Public insurance | 43.9% |
| Uninsured under 19 | 4.3% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 11,237 | 95.4% |
| Spanish | 102 | 0.8% |
| Other Indo-European | 58 | 0.5% |
| Asian & Pacific Islander | 17 | 0.1% |
| Other languages | 27 | 0.3% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 11,523 | 98.5% |
| Born in same state | 11,454 | 97.8% |
| Born in different state | 5,946 | 51.6% |
| Foreign born | 69 | 0.7% |
| Naturalized citizen | 253 | 1.5% |
| Not a US citizen | 156 | 33.3% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 2,257 | 19.2% |
| Italian | 2,070 | 17.6% |
| Polish | 1,118 | 9.5% |
| Arab | 543 | 4.6% |
| Dutch | 212 | 1.8% |
| Ancestry | Count | % |
|---|---|---|
| German | 158 | 1.3% |
| English | 144 | 1.2% |
| Irish | 27 | 0.2% |
| Norwegian | 10 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 39.6% |
| Internet access | 96.6% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
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