58831 ZIP Code — Alexander, ND

Mckenzie County, North Dakota

ZIP code 58831 is located in Alexander, North Dakota, within Mckenzie County. It covers approximately 416.05 square miles and serves a population of 1,133 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 701.

About ZIP code 58831

The housing stock consists of a higher-than-average concentration of mobile homes. Much of the housing stock is relatively new, reflecting recent development activity. Median home value is $346,700. Owner-occupancy is high at 77%, well above the national average.

The gap between median ($90,000) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 5% is below the national average.

The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. The average commute of 26 minutes is near the national average.

College attainment at 13% is below the national average, consistent with a trades and production-oriented local economy.

20% of residents lack health insurance, above the national average.

Overall, ZIP code 58831 reflects a community defined by a trades-oriented workforce and high homeownership.

1,133

population

416.05

sq mi land

Standard

ZIP type

Central (CT)

timezone

58831 ZIP code map

Cities in ZIP code 58831

Below are the cities the US Postal Service accepts for ZIP code 58831. Using any city not on this list may result in mail delivery delays.

City	Status
Alexander	Acceptable
Alexander	Preferred

Nearby ZIP codes

58835 Arnegard (11.2 mi) 58838 Cartwright (13.8 mi)

Demographics updated 05/2026

Population
Total population	1,133
Population density	3 / sq mi
State FIPS	38
County FIPS	053

Geography
Land area	416.05 sq mi
Water area	15.65 sq mi
Latitude	47.8612
Longitude	-103.6392
Timezone	Central (CT)
Area code	701

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	31.4%	26.9%	37.8%
$50k – $100k	20.1%	32.6%	32.8%
$100k – $200k	32.1%	31.7%	23.3%
Over $200k	16.4%	8.8%	6.0%

Demographics & statistics

1,133

Population

People per sq mi

36.1

Median age

$90,000

Median household income

$40,333

Per capita income

$346,700

Median home value

$1,154

Median monthly rent

77.1%

Home ownership

5.4%

Poverty rate

1.4%

Unemployment

441

Housing units

13.2%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

103

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	322	28.4%
18 and over	811	71.6%
65 and over	75	6.6%
Median age	36.1 years

Race & ethnicity

White 79.3%

Black or African American 11.6%

American Indian / Alaska Native 4.5%

Two or more races 2.6%

Hispanic or Latino 1.6%

Other race 0.3%

Group	Count	%
White	913	79.3%
Black or African American	134	11.6%
American Indian / Alaska Native	52	4.5%
Two or more races	30	2.6%
Hispanic or Latino	18	1.6%
Other race	4	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	31.4%	26.9%	37.8%
$50k – $100k	20.1%	32.6%	32.8%
$100k – $200k	32.1%	31.7%	23.3%
Over $200k	16.4%	8.8%	6.0%

Under $10k 3.2%

$15k–$25k 2.6%

$25k–$35k 3.2%

$35k–$50k 10.0%

$50k–$75k 20.0%

$75k–$100k 16.1%

$100k–$150k 21.1%

$150k–$200k 4.7%

$200k+ 19.2%

Range	% of households
Under $10k	3.2%
$15k–$25k	2.6%
$25k–$35k	3.2%
$35k–$50k	10.0%
$50k–$75k	20.0%
$75k–$100k	16.1%
$100k–$150k	21.1%
$150k–$200k	4.7%
$200k+	19.2%
Median income	$90,000

Housing

Home values

Under $50k 6.5%

$50k–$100k 3.4%

$100k–$150k 4.1%

$150k–$200k 15.7%

$200k–$300k 13.0%

$300k–$500k 45.7%

$500k–$1M 10.6%

$1M+ 1.0%

Housing overview

Metric	Value
Median home value	$346,700
Median rent / month	$1,154
Owner occupied	77.1%
Renter occupied	22.9%
Vacant	28.0%
Single-family detached	63.3%
Large apartment buildings	0.0%
Mobile homes	35.6%
Median rooms	5.7
Avg household size (owned)	2.82

Year built

Era	%
2020 or later	4.7%
2010–2019	24.4%
2000–2009	22.3%
1990–1999	4.9%
1980–1989	7.8%
1970–1979	11.0%
1960–1969	3.0%
1950–1959	6.4%
1940–1949	2.7%
1939 or earlier	12.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.1%
2 bedrooms	13.8%
3 bedrooms	45.1%
4 bedrooms	26.3%
5+ bedrooms	9.7%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	19.7%
2 vehicles	24.2%
3 or more	56.1%

Heating fuel

Fuel type	%
Utility gas	16.6%
Electricity	43.2%
Propane / LP gas	37.4%
Wood	2.9%

Households & families

Household type	Count	%
Married-couple family	230	60.5%
Cohabiting couple	40	10.5%
Male householder, no spouse	92	24.2%
Female householder, no spouse	18	4.7%
Households with children under 18	123	32.4%
Households with seniors (65+)	38	10.0%
Average household size	2.85

Marital status

Status	Male	Female
Never married	35.5%	24.6%
Married	52.6%	56.6%
Separated	0.0%	0.0%
Widowed	3.4%	15.9%
Divorced	8.5%	3.0%

Education

Less than 9th grade 1.9%

Some HS, no diploma 6.9%

HS graduate 43.2%

Some college, no degree 20.1%

Associate's degree 14.7%

Bachelor's degree 11.2%

Graduate / professional 1.9%

Metric	%
HS diploma or higher	91.1%
Bachelor's or higher	13.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	14	3.9%
Elementary school	176	48.8%
High school	116	32.1%
College / grad school	55	15.2%

Employment

Industry of employment

Agriculture & mining 18.1%

Education & healthcare 13.3%

Retail trade 13.0%

Transportation & utilities 12.5%

Arts, food & hospitality 11.7%

Public administration 6.2%

Construction 5.5%

Professional & management 5.0%

Other services 4.8%

Wholesale trade 3.6%

Manufacturing 3.4%

Finance & real estate 1.8%

Information 1.1%

Occupation

Category	%
Management, business & arts	36.1%
Service	19.9%
Sales & office	10.9%
Natural resources & construction	17.4%
Production & transportation	15.7%

Employment type

Type	%
Private sector	71.9%
Government	15.8%
Self-employed	11.4%
Unpaid family workers	0.9%

Commute

Method	%
Drive alone	72.3%
Carpool	6.2%
Public transit	2.9%
Walk	13.2%
Work from home	5.3%
Other means	0.0%
Avg commute (minutes)	26.4

Poverty

All people 5.4%

Under 18 years 1.9%

18 and over 6.8%

Married-couple families 5.2%

Female-led households 9.8%

Income support

Source	% of households
Social Security	20.0%
Retirement income	11.6%
Supplemental Security	2.6%
Cash public assistance	1.6%
Food stamps / SNAP	0.3%

Health indicators

Condition	%
Obesity	34.1%
High blood pressure	31.0%
High cholesterol	31.1%
Diabetes	9.6%
Heart disease	6.8%
Stroke	3.0%
Asthma	8.9%
Arthritis	24.5%
Kidney disease	2.8%
Pulmonary disease	6.1%
Cancer	7.0%

Behavior / access	%
Smoking	18.1%
Binge drinking	21.5%
No physical activity	22.9%
Less than 7 hrs sleep	30.1%
Depression	16.8%
Fair or poor health	11.9%
Poor mental health	11.7%
Poor physical health	9.0%
No health insurance	10.0%
Visited doctor (checkup)	67.5%
Visited dentist	66.5%
Cholesterol screening	88.6%
Teeth loss	12.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	44	5.4%

Disability	%
Any disability	11.7%
Under 18	1.6%
18–64 years	12.0%
65 and over	53.3%

Health insurance coverage

Type	%
Private insurance	70.0%
Public insurance	21.8%
No insurance	19.5%
Uninsured under 19	25.6%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,079	95.2%
Spanish	43	4.0%
Other Indo-European	26	2.4%
Asian & Pacific Islander	17	1.6%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,121	98.9%
Born in same state	1,118	98.7%
Born in different state	500	44.1%
Foreign born	3	0.3%
Naturalized citizen	12	1.1%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Polish	295	26%
Italian	100	8.8%
French	30	2.6%
Irish	28	2.5%

Ancestry	Count	%
Arab	21	1.9%
German	10	0.9%
English	2	0.2%

Technology access

Metric	% of households
Computer access	33.5%
Internet access	100.0%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 58831

What city is ZIP code 58831 in?

ZIP code 58831 is primarily assigned to Alexander, North Dakota.

What county is ZIP code 58831 in?

ZIP code 58831 falls within Mckenzie County, North Dakota.

How educated is the population of ZIP code 58831?

13% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the typical home value in ZIP code 58831?

The median home value in ZIP code 58831 is $346,700.

What is the population of ZIP code 58831?

ZIP code 58831 has an estimated population of 1,133 residents, with a density of 3 people per square mile.

What is the median household income in ZIP code 58831?

The median household income in ZIP code 58831 is $90,000, above the national median of ~$75,000.

What timezone is ZIP code 58831 in?

ZIP code 58831 observes the CST timezone.