58634 ZIP Code — Grassy Butte, ND

Mckenzie County, North Dakota

ZIP code 58634 is located in Grassy Butte, North Dakota, within Mckenzie County. It covers approximately 375.43 square miles and serves a population of 318 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 701.

About ZIP code 58634

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $232,100. Owner-occupancy is high at 81%, well above the national average.

The dominant occupation class is management, business, and professional, with construction as the leading industry. The average commute of 20 minutes is near the national average.

318

population

375.43

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

58634 ZIP code map

Cities in ZIP code 58634

Below are the cities the US Postal Service accepts for ZIP code 58634. Using any city not on this list may result in mail delivery delays.

City	Status
Grassy Butte	Acceptable
Grassy Butte	Preferred

Nearby ZIP codes

58835 Arnegard (19.4 mi)

Demographics updated 05/2026

Population
Total population	318
Population density	1 / sq mi
State FIPS	38
County FIPS	053

Geography
Land area	375.43 sq mi
Water area	1.78 sq mi
Latitude	47.4646
Longitude	-103.3780
Timezone	Mountain (MT)
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	11.1%	26.9%	37.8%
$50k – $100k	33.3%	32.6%	32.8%
$100k – $200k	47.6%	31.7%	23.3%
Over $200k	7.9%	8.8%	6.0%

Demographics & statistics

318

Population

People per sq mi

42.0

Median age

Median household income

$65,558

Per capita income

$232,100

Median home value

Median monthly rent

80.5%

Home ownership

7.9%

Poverty rate

0.0%

Unemployment

197

Housing units

0.0%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

25–34

35–44

45–54

55–59

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	77	24.2%
18 and over	241	75.8%
65 and over	35	11.0%
Median age	42.0 years

Race & ethnicity

White 100%

Group	Count	%
White	318	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	11.1%	26.9%	37.8%
$50k – $100k	33.3%	32.6%	32.8%
$100k – $200k	47.6%	31.7%	23.3%
Over $200k	7.9%	8.8%	6.0%

$10k–$15k 6.3%

$50k–$75k 7.8%

$75k–$100k 41.4%

$150k–$200k 9.4%

$200k+ 35.2%

Range	% of households
$10k–$15k	6.3%
$50k–$75k	7.8%
$75k–$100k	41.4%
$150k–$200k	9.4%
$200k+	35.2%
Median income	$0

Housing

Home values

$100k–$150k 17.5%

$150k–$200k 10.7%

$200k–$300k 34.0%

$300k–$500k 24.3%

$500k–$1M 13.6%

Housing overview

Metric	Value
Median home value	$232,100
Median rent / month	$0
Owner occupied	80.5%
Renter occupied	19.5%
Vacant	42.3%
Single-family detached	72.5%
Large apartment buildings	0.0%
Mobile homes	27.5%
Median rooms	5.8
Avg household size (owned)	2.79

Year built

Era	%
2020 or later	0.0%
2010–2019	35.1%
2000–2009	11.3%
1990–1999	40.1%
1980–1989	2.3%
1970–1979	0.0%
1960–1969	3.6%
1950–1959	7.7%
1940–1949	0.0%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	11.3%
2 bedrooms	26.1%
3 bedrooms	44.6%
4 bedrooms	9.0%
5+ bedrooms	9.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	19.5%
2 vehicles	45.3%
3 or more	35.2%

Heating fuel

Fuel type	%
Electricity	50.0%
Propane / LP gas	50.0%

Households & families

Household type	Count	%
Married-couple family	85	66.4%
Cohabiting couple	18	14.1%
Male householder, no spouse	25	19.5%
Female householder, no spouse	0	0.0%
Households with children under 18	49	38.3%
Households with seniors (65+)	18	14.1%
Average household size	2.44

Marital status

Status	Male	Female
Never married	8.7%	0.0%
Married	75.2%	81.0%
Separated	0.0%	0.0%
Widowed	12.1%	5.7%
Divorced	4.0%	13.3%

Education

Less than 9th grade 0.0%

Some HS, no diploma 0.0%

HS graduate 71.0%

Some college, no degree 29.0%

Associate's degree 0.0%

Bachelor's degree 0.0%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	100.0%
Bachelor's or higher	0.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	42	68.9%
High school	13	21.3%
College / grad school	6	9.8%

Employment

Industry of employment

Construction 41.4%

Agriculture & mining 33.1%

Education & healthcare 14.5%

Professional & management 6.9%

Retail trade 4.1%

Occupation

Category	%
Management, business & arts	37.9%
Service	14.5%
Sales & office	11.0%
Natural resources & construction	32.4%
Production & transportation	4.1%

Employment type

Type	%
Private sector	74.5%
Government	0.0%
Self-employed	25.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	89.0%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	6.9%
Other means	4.1%
Avg commute (minutes)	20.4

Poverty

All people 7.9%

Under 18 years 0.0%

18 and over 10.4%

Married-couple families 9.4%

Female-led households 0.0%

Income support

Source	% of households
Social Security	21.9%
Retirement income	31.3%
Supplemental Security	23.4%
Cash public assistance	0.0%
Food stamps / SNAP	9.4%

Health indicators

Condition	%
Obesity	34.0%
High blood pressure	31.9%
High cholesterol	31.6%
Diabetes	9.7%
Heart disease	7.0%
Stroke	3.0%
Asthma	9.0%
Arthritis	25.6%
Kidney disease	2.9%
Pulmonary disease	6.4%
Cancer	7.4%

Behavior / access	%
Smoking	17.7%
Binge drinking	20.3%
No physical activity	23.0%
Less than 7 hrs sleep	29.6%
Depression	17.3%
Fair or poor health	12.0%
Poor mental health	11.8%
Poor physical health	9.1%
No health insurance	9.4%
Visited doctor (checkup)	68.7%
Visited dentist	67.1%
Cholesterol screening	89.7%
Teeth loss	12.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	26	10.8%

Disability	%
Any disability	17.0%
Under 18	0.0%
18–64 years	23.8%
65 and over	14.3%

Health insurance coverage

Type	%
Private insurance	90.9%
Public insurance	16.7%
No insurance	5.7%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	296	93.1%
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)	318	100.0%
Born in same state	318	100.0%
Born in different state	170	53.5%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Polish	77	24.2%
Italian	31	9.7%

Ancestry	Count	%
French	25	7.9%
German	5	1.6%

Technology access

Metric	% of households
Computer access	40.3%
Internet access	96.1%

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

Frequently asked questions about ZIP code 58634

What city is ZIP code 58634 in?

ZIP code 58634 is primarily assigned to Grassy Butte, North Dakota.

What county is ZIP code 58634 in?

ZIP code 58634 falls within Mckenzie County, North Dakota.

Is ZIP code 58634 mostly owner-occupied?

81% of occupied units in ZIP code 58634 are owner-occupied, well above the national average.

Does ZIP code 58634 have a large veteran population?

11% of civilians in ZIP code 58634 are veterans, above the national average of ~7%.

What is the population of ZIP code 58634?

ZIP code 58634 has an estimated population of 318 residents, with a density of 1 people per square mile.

What is the typical home value in ZIP code 58634?

The median home value in ZIP code 58634 is $232,100.

What timezone is ZIP code 58634 in?

ZIP code 58634 observes the CST timezone.