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Montana ZIP Codes
Chouteau County
Carter, MT
59420
59420 ZIP Code — Carter, MT
Chouteau County, Montana
ZIP code 59420 is located in
Carter ,
Montana ,
within Chouteau County .
It covers approximately 249.01 square miles and serves a population of
251 residents.
This is a standard ZIP code in the Mountain (MT) timezone,
served by area code 406 .
About ZIP code 59420
The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Owner-occupancy is high at 85%, well above the national average.
Median household income is $57,969. 48% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is natural resources, construction, and trades, with agriculture and mining as the leading industry. The average commute of 20 minutes is near the national average.
Educational attainment is near the national average, with 27% of residents holding a bachelor's degree or higher.
18% of residents lack health insurance, above the national average.
Overall, ZIP code 59420 reflects a community defined by high homeownership and a significant Social Security-dependent population.
59420 ZIP code map
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Cities in ZIP code 59420
Below are the cities the US Postal Service accepts for ZIP code 59420. Using any city not on this list may result in mail delivery delays.
Nearby ZIP codes
Demographics
updated 06/2026
Population
Total population
251
Population density
1 / sq mi
State FIPS
30
County FIPS
015
Geography
Land area
249.01 sq mi
Water area
0.12 sq mi
Latitude
47.8719
Longitude
-111.1096
Timezone
Mountain (MT)
Area code
406
Economics
updated 06/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
41.6%
49.6%
44.2%
$50k – $100k
31.5%
30.0%
32.0%
$100k – $200k
14.6%
17.2%
19.2%
Over $200k
12.4%
3.2%
4.7%
Demographics & statistics
$57,969
Median household income
26.9%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 44 17.5% 18 and over 207 82.5% 65 and over 56 22.3% Median age 46.9 years
Race & ethnicity
Group Count % White 238 90.8% Two or more races 13 5% Hispanic or Latino 11 4.2%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
41.6%
49.6%
44.2%
$50k – $100k
31.5%
30.0%
32.0%
$100k – $200k
14.6%
17.2%
19.2%
Over $200k
12.4%
3.2%
4.7%
Range % of households Under $10k 2.5% $10k–$15k 10.1% $15k–$25k 13.9% $25k–$35k 7.6% $35k–$50k 13.9% $50k–$75k 19.0% $75k–$100k 11.4% $100k–$150k 3.8% $150k–$200k 8.9% $200k+ 8.9% Median income $57,969
Housing
Housing overview
Metric Value Median home value $0 Median rent / month $0 Owner occupied 84.8% Renter occupied 15.2% Vacant 16.8% Single-family detached 86.3% Large apartment buildings 0.0% Mobile homes 6.3% Median rooms 6.3 Avg household size (owned) 2.30
Year built
Era % 2020 or later 0.0% 2010–2019 1.1% 2000–2009 4.2% 1990–1999 5.3% 1980–1989 6.3% 1970–1979 31.6% 1960–1969 0.0% 1950–1959 6.3% 1940–1949 10.5% 1939 or earlier 34.7%
Bedrooms
Size % of units No bedroom (studio) 0.0% 1 bedroom 0.0% 2 bedrooms 36.8% 3 bedrooms 35.8% 4 bedrooms 23.2% 5+ bedrooms 4.2%
Vehicles per household
Vehicles % of households No vehicle 5.1% 1 vehicle 8.9% 2 vehicles 27.8% 3 or more 58.2%
Heating fuel
Fuel type % Utility gas 7.6% Electricity 13.9% Propane / LP gas 67.1% Fuel oil 3.8% Wood 7.6%
Households & families
Household type Count % Married-couple family 52 65.8% Cohabiting couple 2 2.5% Male householder, no spouse 11 13.9% Female householder, no spouse 14 17.7% Households with children under 18 17 21.5% Households with seniors (65+) 37 46.8% Average household size 2.86
Marital status
Status Male Female Never married 47.4% 31.1% Married 44.0% 53.8% Separated 0.0% 0.0% Widowed 0.0% 12.3% Divorced 8.6% 2.8%
Education
Some college, no degree
12.5%
Graduate / professional
5.6%
Metric % HS diploma or higher 92.5% Bachelor's or higher 26.9%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 2 5.6% Kindergarten 0 0.0% Elementary school 19 52.8% High school 15 41.7% College / grad school 0 0.0%
Employment
Industry of employment
Agriculture & mining
28.3%
Professional & management
6.7%
Transportation & utilities
5.8%
Education & healthcare
5.8%
Public administration
5.0%
Finance & real estate
4.2%
Occupation
Category % Management, business & arts 25.0% Service 0.8% Sales & office 12.5% Natural resources & construction 44.2% Production & transportation 17.5%
Employment type
Type % Private sector 64.2% Government 16.7% Self-employed 12.5% Unpaid family workers 6.7%
Commute
Method % Drive alone 38.1% Carpool 33.9% Public transit 0.0% Walk 14.4% Work from home 13.6% Other means 0.0% Avg commute (minutes) 20.0
Poverty
Married-couple families
3.8%
Female-led households
0.0%
Income support
Source % of households Social Security 48.1% Retirement income 20.3% Supplemental Security 0.0% Cash public assistance 10.1% Food stamps / SNAP 1.3%
Health indicators
Condition % Obesity 31.0% High blood pressure 30.8% High cholesterol 31.3% Diabetes 9.2% Heart disease 6.8% Stroke 3.0% Asthma 9.6% Arthritis 27.8% Kidney disease 2.9% Pulmonary disease 6.6% Cancer 7.7%
Behavior / access % Smoking 16.1% Binge drinking 21.8% No physical activity 20.5% Less than 7 hrs sleep 30.2% Depression 21.8% Fair or poor health 11.8% Poor mental health 12.0% Poor physical health 10.0% No health insurance 11.0% Visited doctor (checkup) 70.3% Visited dentist 65.7% Cholesterol screening 89.9% Teeth loss 11.1%
Veterans & disability
Veterans Count % Civilian veterans 14 6.8%
Disability % Any disability 8.4% Under 18 6.8% 18–64 years 2.6% 65 and over 25.0%
Health insurance coverage
Type % Private insurance 53.0% Public insurance 45.0% No insurance 17.5% Uninsured under 19 0.0%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 243 96.8% 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) 246 98.0% Born in same state 241 96.0% Born in different state 127 50.6% Foreign born 5 2.0% Naturalized citizen 5 2.0% Not a US citizen 5 100.0%
Ancestry
Ancestry Count % Arab 47 18.7% French 45 17.9% Polish 13 5.2% Italian 8 3.2%
Ancestry Count % English 5 2% Dutch 4 1.6% German 1 0.4%
Technology access
Metric % of households Computer access 31.5% Internet access 81.0%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 59420
What city is ZIP code 59420 in?
ZIP code 59420 is primarily assigned to Carter, Montana.
What county is ZIP code 59420 in?
ZIP code 59420 falls within Chouteau County, Montana.
Does ZIP code 59420 have a large retiree population?
48% of households in ZIP code 59420 receive Social Security income, suggesting a significant retiree or disability population.
Is ZIP code 59420 mostly owner-occupied?
85% of occupied units in ZIP code 59420 are owner-occupied, well above the national average.
What is the population of ZIP code 59420?
ZIP code 59420 has an estimated population of 251 residents, with a density of 1 people per square mile.
What is the median household income in ZIP code 59420?
The median household income in ZIP code 59420 is $57,969, below the national median of ~$75,000.
What timezone is ZIP code 59420 in?
ZIP code 59420 observes the MST timezone.
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