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Montana ZIP Codes
Granite County
Philipsburg, MT
59858
59858 ZIP Code — Philipsburg, MT
Granite County, Montana
ZIP code 59858 is located in
Philipsburg ,
Montana ,
within Granite County .
It covers approximately 880.17 square miles and serves a population of
1,678 residents.
This is a standard ZIP code in the Mountain (MT) timezone,
served by area code 406 .
About ZIP code 59858
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 $241,000. Owner-occupancy sits near the national average at 72%.
Median household income is $45,313. 63% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, 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 38% of residents holding a bachelor's degree or higher.
Notable community characteristics include a notable veteran presence at 12% of civilians, above the national average of 7%.
Overall, ZIP code 59858 reflects a community defined by a strong veteran community and a significant Social Security-dependent population.
59858 ZIP code map
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Cities in ZIP code 59858
Below are the cities the US Postal Service accepts for ZIP code 59858. Using any city not on this list may result in mail delivery delays.
Nearby ZIP codes
Demographics
updated 07/2026
Population
Total population
1,678
Population density
2 / sq mi
State FIPS
30
County FIPS
039
Geography
Land area
880.17 sq mi
Water area
1.34 sq mi
Latitude
46.2549
Longitude
-113.4300
Timezone
Mountain (MT)
Area code
406
Economics
updated 07/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
48.9%
48.5%
44.2%
$50k – $100k
40.1%
37.1%
32.0%
$100k – $200k
8.0%
8.2%
19.2%
Over $200k
3.0%
6.3%
4.7%
Demographics & statistics
$45,313
Median household income
$241,000
Median home value
$1,052
Median monthly rent
38.2%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 241 14.4% 18 and over 1,437 85.6% 65 and over 534 31.8% Median age 54.0 years
Race & ethnicity
American Indian / Alaska Native
0.7%
Group Count % White 1,511 85.2% Two or more races 124 7% Hispanic or Latino 96 5.4% Asian 30 1.7% American Indian / Alaska Native 13 0.7%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
48.9%
48.5%
44.2%
$50k – $100k
40.1%
37.1%
32.0%
$100k – $200k
8.0%
8.2%
19.2%
Over $200k
3.0%
6.3%
4.7%
Range % of households Under $10k 8.3% $10k–$15k 1.8% $15k–$25k 14.5% $25k–$35k 16.5% $35k–$50k 11.0% $50k–$75k 20.4% $75k–$100k 11.5% $100k–$150k 10.0% $150k–$200k 2.1% $200k+ 3.9% Median income $45,313
Housing
Housing overview
Metric Value Median home value $241,000 Median rent / month $1,052 Owner occupied 71.5% Renter occupied 28.5% Vacant 36.5% Single-family detached 84.0% Large apartment buildings 0.0% Mobile homes 7.1% Median rooms 5.1 Avg household size (owned) 2.43
Year built
Era % 2020 or later 0.0% 2010–2019 11.4% 2000–2009 15.2% 1990–1999 15.1% 1980–1989 6.7% 1970–1979 9.6% 1960–1969 2.9% 1950–1959 3.6% 1940–1949 11.9% 1939 or earlier 23.7%
Bedrooms
Size % of units No bedroom (studio) 7.8% 1 bedroom 15.4% 2 bedrooms 29.4% 3 bedrooms 28.9% 4 bedrooms 14.3% 5+ bedrooms 4.3%
Vehicles per household
Vehicles % of households No vehicle 5.5% 1 vehicle 17.7% 2 vehicles 30.6% 3 or more 46.2%
Heating fuel
Fuel type % Utility gas 37.7% Electricity 15.1% Propane / LP gas 17.6% Wood 29.2%
Households & families
Household type Count % Married-couple family 350 52.2% Cohabiting couple 18 2.7% Male householder, no spouse 146 21.8% Female householder, no spouse 157 23.4% Households with children under 18 88 13.1% Households with seniors (65+) 378 56.3% Average household size 2.39
Marital status
Status Male Female Never married 28.9% 28.5% Married 51.8% 50.7% Separated 0.0% 0.0% Widowed 4.0% 9.9% Divorced 15.3% 10.9%
Education
Some college, no degree
14.2%
Graduate / professional
8.0%
Metric % HS diploma or higher 91.7% Bachelor's or higher 38.2%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 79 25.1% Kindergarten 0 0.0% Elementary school 79 25.1% High school 100 31.7% College / grad school 57 18.1%
Employment
Industry of employment
Agriculture & mining
22.5%
Arts, food & hospitality
16.8%
Education & healthcare
15.9%
Professional & management
9.9%
Public administration
2.6%
Transportation & utilities
0.3%
Occupation
Category % Management, business & arts 40.1% Service 19.3% Sales & office 12.8% Natural resources & construction 12.3% Production & transportation 15.5%
Employment type
Type % Private sector 84.0% Government 5.0% Self-employed 11.0% Unpaid family workers 0.0%
Commute
Method % Drive alone 63.7% Carpool 12.6% Public transit 0.0% Walk 16.1% Work from home 7.6% Other means 0.0% Avg commute (minutes) 20.4
Poverty
Married-couple families
4.0%
Female-led households
100.0%
Income support
Source % of households Social Security 62.9% Retirement income 41.1% Supplemental Security 7.2% Cash public assistance 1.0% Food stamps / SNAP 8.2%
Health indicators
Condition % Obesity 30.4% High blood pressure 35.3% High cholesterol 36.8% Diabetes 11.2% Heart disease 8.4% Stroke 3.8% Asthma 9.7% Arthritis 32.5% Kidney disease 3.5% Pulmonary disease 8.1% Cancer 9.2%
Behavior / access % Smoking 16.2% Binge drinking 17.7% No physical activity 21.3% Less than 7 hrs sleep 28.9% Depression 20.8% Fair or poor health 14.0% Poor mental health 11.5% Poor physical health 11.6% No health insurance 10.9% Visited doctor (checkup) 73.8% Visited dentist 65.2% Cholesterol screening 91.8% Teeth loss 12.4%
Veterans & disability
Veterans Count % Civilian veterans 169 11.8%
Disability % Any disability 18.0% Under 18 0.0% 18–64 years 16.2% 65 and over 29.7%
Health insurance coverage
Type % Private insurance 59.9% Public insurance 51.7% No insurance 8.7% Uninsured under 19 14.4%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 1,580 94.2% Spanish 22 1.4% Other Indo-European 0 0.0% Asian & Pacific Islander 0 0.0% Other languages 22 1.4%
Place of birth & citizenship
Origin Count % Native born (US) 1,609 95.9% Born in same state 1,589 94.7% Born in different state 706 42.1% Foreign born 20 1.2% Naturalized citizen 69 4.1% Not a US citizen 10 14.5%
Ancestry
Ancestry Count % French 410 24.4% Italian 143 8.5% Polish 83 4.9%
Ancestry Count % Arab 48 2.9% German 14 0.8% Irish 7 0.4%
Technology access
Metric % of households Computer access 40.0% Internet access 90.0%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 59858
What city is ZIP code 59858 in?
ZIP code 59858 is primarily assigned to Philipsburg, Montana.
What county is ZIP code 59858 in?
ZIP code 59858 falls within Granite County, Montana.
Does ZIP code 59858 have a large retiree population?
63% of households in ZIP code 59858 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 59858 have an older population?
32% of residents in ZIP code 59858 are 65 or older, above the national average of ~17%.
What is the poverty rate in ZIP code 59858?
17% of residents in ZIP code 59858 live below the poverty line, above the national average.
Does ZIP code 59858 have a large veteran population?
12% of civilians in ZIP code 59858 are veterans, above the national average of ~7%.
What timezone is ZIP code 59858 in?
ZIP code 59858 observes the MST timezone.
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