Postal Codes

58831 ZIP Code

Advertisement

English Español

ZIP code 58831 covers Alexander, North Dakota, with a population of about 1,100 and a median household income of $133,750.

Population
1,1003 per square mile
Median age
39.1about the US average
Median household income
$133,7501.8× the North Dakota median
Poverty rate
6.7%5.7 points below the US average
Typical home value
$336,281
Median rent
$1,3961.5× the North Dakota median
Degree or higher
13.7%21.3 points below the US average
Homeownership
73%8 points above the US average
Time zone
Central UTC-06:00observes daylight saving time
Businesses
51

Where 58831 is

Alexander, North Dakota — the area the Census Bureau draws for this ZIP code. ZIP codes are sets of delivery routes rather than areas, so this is the Census approximation of one, not a Postal Service boundary.

People and households

American Community Survey 2019–2023 five-year estimates

Population1,100
Median age39.1
Family households84.7%
Born outside the US0.5%
Speaks a language other than English at home1.1%
White (non-Hispanic)80.5%
Black (non-Hispanic)11.1%
Asian (non-Hispanic)0%
Hispanic or Latino2.7%
Veterans6.6%
Population by age
MaleFemale0-45-910-1415-1920-2425-3435-4445-5455-6465-7475-8485+
Income and poverty

American Community Survey 2019–2023 five-year estimates

Median household income$133,750
Income per person$46,475
Poverty rate6.7%
Households on SNAP or cash assistance1.7%

Household income distribution

Under $10k3.9%
$10–15k0.0%
$15–20k0.5%
$20–25k0.0%
$25–30k0.0%
$30–35k1.9%
$35–40k1.9%
$40–45k2.9%
$45–50k3.4%
$50–60k8.3%
$60–75k8.5%
$75–100k13.6%
$100–125k4.9%
$125–150k10.0%
$150–200k21.2%
$200k or more19.0%

Income as declared to the IRS

Filed returns rather than survey responses, so this counts tax units and not households.

Tax returns filed440
Mean adjusted gross income$128,691
Returns declaring $200,000 or more13.6%
Returns, under $25k15.9%
Returns, $25k–$50k18.2%
Returns, $50k–$75k11.4%
Returns, $75k–$100k13.6%
Returns, $100k–$200k27.3%
Returns, $200k or more13.6%
Housing

American Community Survey 2019–2023 five-year estimates

Median home value$384,100
Median gross rent$1,396
Rent as a share of household income12.5%
Owner-occupied73%
Vacant homes22.7%
Median year built2002

What the homes are

Detached house60.2%
Attached house3.4%
Mobile home36.5%
Home values and rents today

Zillow Home Value Index and Zillow Observed Rent Index, courtesy of Zillow. Monthly and current, where the Census figures above are a five-year average and are capped at $2,000,000.

Typical home value$336,281as of 2026-07
Typical home value, 1 yearup 9.4%
Work, commuting and education

American Community Survey 2019–2023 five-year estimates

Unemployment rate0.4%
Bachelor's degree or higher13.7%
High school diploma or higher91.8%
Works from home5.4%
Drives to work alone69.7%
Takes public transport2.9%
Commutes 45 minutes or more8%
Health

CDC PLACES 2025 release, model-based estimates. These are modelled small-area estimates for adults, not counts of diagnosed cases.

Obesity40.2% 6.8 pts above the national average of 33.4%
Diagnosed diabetes9.5% 2.5 pts below the national average of 12%
Currently smokes15.2% 2 pts above the national average of 13.2%
High blood pressure31.5% 2.6 pts below the national average of 34.1%
Fair or poor general health15.5% 4.8 pts below the national average of 20.3%
No health insurance (18–64)7.7% 3.6 pts below the national average of 11.3%
Depression20.8% 1.1 pts below the national average of 21.9%
No leisure-time physical activity22.7% 2.7 pts below the national average of 25.4%
Arthritis25.2% same as the national average of 25.1%
Binge drinking22.9% 6.9 pts above the national average of 16%
Taking blood pressure medication74% 0.7 pts below the national average of 74.7%
Cancer (non-skin)7.6% same as the national average of 7.7%
Current asthma10.2% same as the national average of 10.4%
Coronary heart disease5.6% 0.6 pts below the national average of 6.2%
Routine check-up in past year71.9% 4.8 pts below the national average of 76.7%
Cholesterol screening83.2% 2.7 pts below the national average of 85.9%
Cognitive disability12.7% 2.1 pts below the national average of 14.8%
Colorectal screening63.2% 1.1 pts below the national average of 64.3%
COPD5.7% 0.9 pts below the national average of 6.6%
Visited a dentist61.3% same as the national average of 61.3%
Any disability27.4% 3.3 pts below the national average of 30.7%
Lacks emotional support22.7% 2.1 pts below the national average of 24.8%
Food insecurity10.4% 6.7 pts below the national average of 17.1%
Received food stamps6.3% 8 pts below the national average of 14.3%
Hearing disability7.2% 0.5 pts above the national average of 6.7%
High cholesterol33.1% 3.1 pts below the national average of 36.2%
Housing insecurity9.3% 4.5 pts below the national average of 13.8%
Independent living disability6.7% 1.7 pts below the national average of 8.4%
Lacks transport6.2% 3 pts below the national average of 9.2%
Loneliness29.4% 5 pts below the national average of 34.4%
Mammography use74.6% 1.3 pts below the national average of 75.9%
Poor mental health (14+ days)14.8% 2 pts below the national average of 16.8%
Mobility disability10.5% 3.5 pts below the national average of 14%
Poor physical health (14+ days)11.7% 1.8 pts below the national average of 13.5%
Self-care disability3% 1 pts below the national average of 4%
Utility shut-off threat5.9% 2.9 pts below the national average of 8.8%
Sleeps under 7 hours37.8% 1.4 pts above the national average of 36.4%
Stroke2.8% 0.6 pts below the national average of 3.4%
All natural teeth lost15.4% 2.4 pts above the national average of 13%
Vision disability3.8% 1.8 pts below the national average of 5.6%
Business and employment

Census ZIP Code Business Patterns 2022

Business establishments51
People employed467
Annual payroll$47,976,000
Advertisement
Natural hazard risk

FEMA National Risk Index, estimated for this ZIP code from census tract data — the NRI is not published per ZIP.

Overall riskHigher than 63.5% of US census tracts
FEMA ratingRelatively Moderate
Expected annual loss78.5 out of 100
Community resilience34.2 out of 100

By hazard

Score is out of 100 and is the area-weighted average across the census tracts this ZIP code covers. The rating beside it is the highest any one of those tracts carries.

Winter weather98.8Very High at its worst in this ZIP code
Cold wave96.2Very High at its worst in this ZIP code
Hail96.1Relatively High at its worst in this ZIP code
Wildfire92.4Relatively Moderate at its worst in this ZIP code
Ice storm92.1Relatively High at its worst in this ZIP code
Strong wind89.8Relatively High at its worst in this ZIP code
Drought88.8Relatively Low at its worst in this ZIP code
Landslide87.8Relatively Low at its worst in this ZIP code
Tornado60.4Relatively Moderate at its worst in this ZIP code
River flooding54.5Relatively Moderate at its worst in this ZIP code
Lightning54Relatively Moderate at its worst in this ZIP code
Earthquake10.8Very Low at its worst in this ZIP code
Heat wave10.5Relatively Low at its worst in this ZIP code
Compared with North Dakota and the United States

State and national columns are figures for those areas, not for this ZIP code. American Community Survey 2019–2023 five-year estimates

This ZIPNorth DakotaUnited States
Median household income$133,750$75,949$78,538
Income per person$46,475$42,474$43,289
Poverty rate6.7%10.6%12.4%
Median home value$384,100$241,100$303,400
Median gross rent$1,396$934$1,348
Homeownership73%63.4%65%
Bachelor's degree or higher13.7%32.3%35%
Unemployment rate0.4%2.8%5.2%
Works from home5.4%7.3%13.5%
Born outside the US0.5%4.5%13.9%
Median age39.135.738.7
Climate

NOAA US Climate Normals 1991-2020, from the nearest weather station with a full year of records. The station and its distance are named above, because a station forty kilometres away describes somewhere else.

Weather stationWATFORD CITY, ND US27.3 km away
Rain in a year16 in
Snow in a year50 in

Average high and low by month

January21.6°F / 5.1°F0.5 in rain, 9.5 in snow
February26.2°F / 8.1°F0.41 in rain, 8.2 in snow
March38.8°F / 18.8°F0.63 in rain, 7.3 in snow
April53.1°F / 30.5°F0.96 in rain, 4.2 in snow
May64.8°F / 42.1°F2.38 in rain, 1.4 in snow
June74.1°F / 52.9°F3.44 in rain
July82.2°F / 57.9°F2.63 in rain
August81.6°F / 55.4°F1.35 in rain
September71.1°F / 44.9°F1.16 in rain
October54.7°F / 32.6°F1.04 in rain, 2.9 in snow
November38°F / 20°F0.6 in rain, 6.8 in snow
December26.2°F / 9.9°F0.55 in rain, 10.1 in snow
Access to food

USDA Food Access Research Atlas, estimated for this ZIP code from census tract data. Each figure is the share of the ZIP code's land area that falls in a tract carrying that flag.

Low income and far from a supermarketNone of this ZIP code
Far from a supermarketNone of this ZIP code
No vehicle and far from a supermarketNone of this ZIP code
School districts

NCES Geographic Relationship File 2025, which states the association between each district and each ZIP code tabulation area directly. Elementary and secondary districts can cover the same ground, so shares need not total 100%.

This ZIP code is served by 3 school districts, so the address decides which one, not the ZIP code.

Alexander Public School District 276% of this ZIP code's land area
Horse Creek Public School District 3212.8% of this ZIP code's land area
McKenzie County Public School District 111% of this ZIP code's land area
Community and walkability

CDC/ATSDR Social Vulnerability Index 2022 and the EPA National Walkability Index, both estimated for this ZIP code from census tract data. Vulnerability figures are national percentile ranks, not measurements.

Overall social vulnerability48more vulnerable than 48% of US census tracts
Socioeconomic status31more vulnerable than 31% of US census tracts
Household characteristics57more vulnerable than 57% of US census tracts
Racial and ethnic minority status23more vulnerable than 23% of US census tracts
Housing type and transport74more vulnerable than 74% of US census tracts
Walkability4.6 out of 20Least walkable
Nearby ZIP codes

The closest ZIP codes by centre point, which is not the same as sharing a border.

58835 Arnegard, ND15.1 km away
58838 Cartwright, ND22 km away
58854 Watford City, ND29.6 km away
58853 Trenton, ND33.6 km away
59270 Sidney, MT39.1 km away
58803 Williston, ND39.2 km away
58802 Williston, ND41.7 km away
59221 Fairview, MT44.3 km away
Location, counties and time zone

County shares from Census 2020 ZCTA relationship files. Time zone from the USDOT National Transportation Atlas, which renders the boundaries written into 49 CFR Part 71.

McKenzie County100% of this ZIP code's land area
Time zoneCentral (UTC-06:00 standard)
Daylight saving timeObserved
Land area416.05 sq mi
Water area15.64 sq mi
Population density3 people per sq mi
Latitude, longitude47.7947, -103.6546

Figures are published for this ZIP code or its Census tabulation area unless a section says otherwise. Estimates whose margin of error made them unreliable are omitted rather than shown. Sources: US Census Bureau, CDC, IRS.

Advertisement