58643 ZIP Code — Marmarth, ND
Slope County, North Dakota
ZIP code 58643 is located in Marmarth, North Dakota, within Slope County. It covers approximately 141.22 square miles and serves a population of 122 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 701.
122
population
141.22
sq mi land
Standard
ZIP type
Mountain (MT)
timezone
58643 ZIP code map
Cities in ZIP code 58643
Below are the cities the US Postal Service accepts for ZIP code 58643. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Marmarth | Acceptable |
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 122 |
| Population density | 1 / sq mi |
| State FIPS | 38 |
| County FIPS | 087 |
| Geography | |
|---|---|
| Land area | 141.22 sq mi |
| Water area | 0.72 sq mi |
| Latitude | 46.4105 |
| Longitude | -103.8606 |
| Timezone | Mountain (MT) |
| Area code | 701 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 45.3% | 50.0% | 37.8% |
| $50k – $100k | 39.5% | 30.3% | 32.8% |
| $100k – $200k | 11.6% | 17.6% | 23.3% |
| Over $200k | 3.5% | 2.1% | 6.0% |
Demographics & statistics
122
Population
1
People per sq mi
49.8
Median age
$58,833
Median household income
$42,030
Per capita income
$0
Median home value
$513
Median monthly rent
85.7%
Home ownership
9.0%
Poverty rate
1.8%
Unemployment
99
Housing units
25.5%
Bachelor's or higher
Age distribution
Male
Female
2
Under 5
2
6
5–9
5
5
10–14
4
1
15–19
1
1
20–24
1
5
25–34
3
12
35–44
8
6
45–54
4
2
55–59
2
12
60–64
9
8
65–74
6
8
75–84
5
2
85+
2
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 24 | 19.7% |
| 18 and over | 98 | 80.3% |
| 65 and over | 31 | 25.4% |
| Median age | 49.8 years | |
Race & ethnicity
White
88.5%
Two or more races
11.5%
| Group | Count | % |
|---|---|---|
| White | 108 | 88.5% |
| Two or more races | 14 | 11.5% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 45.3% | 50.0% | 37.8% |
| $50k – $100k | 39.5% | 30.3% | 32.8% |
| $100k – $200k | 11.6% | 17.6% | 23.3% |
| Over $200k | 3.5% | 2.1% | 6.0% |
Under $10k
5.7%
$10k–$15k
4.3%
$15k–$25k
12.9%
$25k–$35k
5.7%
$35k–$50k
5.7%
$50k–$75k
35.7%
$75k–$100k
10.0%
$100k–$150k
14.3%
$200k+
5.7%
| Range | % of households |
|---|---|
| Under $10k | 5.7% |
| $10k–$15k | 4.3% |
| $15k–$25k | 12.9% |
| $25k–$35k | 5.7% |
| $35k–$50k | 5.7% |
| $50k–$75k | 35.7% |
| $75k–$100k | 10.0% |
| $100k–$150k | 14.3% |
| $200k+ | 5.7% |
| Median income | $58,833 |
Housing
Home values
Under $50k
50.0%
$50k–$100k
18.3%
$100k–$150k
13.3%
$150k–$200k
3.3%
$200k–$300k
3.3%
$300k–$500k
10.0%
$500k–$1M
1.7%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $0 |
| Median rent / month | $513 |
| Owner occupied | 85.7% |
| Renter occupied | 14.3% |
| Vacant | 35.8% |
| Single-family detached | 86.2% |
| Large apartment buildings | 0.0% |
| Mobile homes | 13.8% |
| Median rooms | 5.6 |
| Avg household size (owned) | 1.78 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 1.8% |
| 2000–2009 | 12.8% |
| 1990–1999 | 0.0% |
| 1980–1989 | 4.6% |
| 1970–1979 | 11.9% |
| 1960–1969 | 2.8% |
| 1950–1959 | 0.9% |
| 1940–1949 | 17.4% |
| 1939 or earlier | 47.7% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.8% |
| 1 bedroom | 16.5% |
| 2 bedrooms | 31.2% |
| 3 bedrooms | 29.4% |
| 4 bedrooms | 15.6% |
| 5+ bedrooms | 5.5% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 1.4% |
| 1 vehicle | 18.6% |
| 2 vehicles | 25.7% |
| 3 or more | 54.3% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 68.6% |
| Electricity | 8.6% |
| Propane / LP gas | 20.0% |
| Wood | 2.9% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 35 | 50.0% |
| Cohabiting couple | 1 | 1.4% |
| Male householder, no spouse | 21 | 30.0% |
| Female householder, no spouse | 13 | 18.6% |
| Households with children under 18 | 23 | 32.9% |
| Households with seniors (65+) | 28 | 40.0% |
| Average household size | 1.74 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 20.0% | 15.8% |
| Married | 63.3% | 55.3% |
| Separated | 0.0% | 0.0% |
| Widowed | 0.0% | 15.8% |
| Divorced | 16.7% | 13.2% |
Education
Less than 9th grade
8.5%
Some HS, no diploma
14.9%
HS graduate
28.7%
Some college, no degree
8.5%
Associate's degree
13.8%
Bachelor's degree
23.4%
Graduate / professional
2.1%
| Metric | % |
|---|---|
| HS diploma or higher | 76.6% |
| Bachelor's or higher | 25.5% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 0 | 0.0% |
| Kindergarten | 0 | 0.0% |
| Elementary school | 20 | 100.0% |
| High school | 0 | 0.0% |
| College / grad school | 0 | 0.0% |
Employment
Industry of employment
Agriculture & mining
23.2%
Transportation & utilities
23.2%
Education & healthcare
17.9%
Professional & management
14.3%
Other services
10.7%
Public administration
7.1%
Construction
3.6%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 32.1% |
| Service | 17.9% |
| Sales & office | 16.1% |
| Natural resources & construction | 10.7% |
| Production & transportation | 23.2% |
Employment type
| Type | % |
|---|---|
| Private sector | 73.2% |
| Government | 12.5% |
| Self-employed | 14.3% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 71.4% |
| Carpool | 14.3% |
| Public transit | 0.0% |
| Walk | 3.6% |
| Work from home | 10.7% |
| Other means | 0.0% |
| Avg commute (minutes) | 35.1 |
Poverty
All people
9.0%
Under 18 years
0.0%
18 and over
11.2%
Married-couple families
0.0%
Female-led households
100.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 57.1% |
| Retirement income | 7.1% |
| Supplemental Security | 25.7% |
| Cash public assistance | 2.9% |
| Food stamps / SNAP | 14.3% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 33.0% |
| High blood pressure | 34.4% |
| High cholesterol | 32.6% |
| Diabetes | 10.6% |
| Heart disease | 7.4% |
| Stroke | 3.2% |
| Asthma | 8.9% |
| Arthritis | 26.5% |
| Kidney disease | 3.1% |
| Pulmonary disease | 6.7% |
| Cancer | 7.9% |
| Behavior / access | % |
|---|---|
| Smoking | 17.6% |
| Binge drinking | 19.2% |
| No physical activity | 25.9% |
| Less than 7 hrs sleep | 28.3% |
| Depression | 17.8% |
| Fair or poor health | 13.0% |
| Poor mental health | 11.8% |
| Poor physical health | 9.5% |
| No health insurance | 10.4% |
| Visited doctor (checkup) | 70.7% |
| Visited dentist | 64.2% |
| Cholesterol screening | 89.8% |
| Teeth loss | 12.7% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 8 | 8.2% |
| Disability | % |
|---|---|
| Any disability | 21.3% |
| Under 18 | 0.0% |
| 18–64 years | 20.9% |
| 65 and over | 38.7% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 65.6% |
| Public insurance | 41.8% |
| No insurance | 8.2% |
| Uninsured under 19 | 11.5% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 118 | 96.7% |
| 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) | 122 | 100.0% |
| Born in same state | 122 | 100.0% |
| Born in different state | 49 | 40.2% |
| Foreign born | 0 | 0.0% |
| Naturalized citizen | 0 | 0.0% |
| Not a US citizen | 0 | 0.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Dutch | 11 | 9% |
| Polish | 9 | 7.4% |
| Ancestry | Count | % |
|---|---|---|
| Italian | 6 | 4.9% |
| French | 6 | 4.9% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 57.4% |
| Internet access | 81.4% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 58643
What city is ZIP code 58643 in?
ZIP code 58643 is primarily assigned to Marmarth, North Dakota.
What county is ZIP code 58643 in?
ZIP code 58643 falls within Slope County, North Dakota.
Does ZIP code 58643 have a large retiree population?
57% of households in ZIP code 58643 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 58643 have an older population?
25% of residents in ZIP code 58643 are 65 or older, above the national average of ~17%.
Is ZIP code 58643 mostly owner-occupied?
86% of occupied units in ZIP code 58643 are owner-occupied, well above the national average.
What is the population of ZIP code 58643?
ZIP code 58643 has an estimated population of 122 residents, with a density of 1 people per square mile.
What timezone is ZIP code 58643 in?
ZIP code 58643 observes the MST timezone.