ZipCodesToGo
North Dakota ZIP Codes
Dunn County
Killdeer, ND
58640
58640 ZIP Code — Killdeer, ND
Dunn County, North Dakota
ZIP code 58640 is located in
Killdeer ,
North Dakota ,
within Dunn County .
It covers approximately 437.43 square miles and serves a population of
1,226 residents.
This is a standard ZIP code in the Mountain (MT) timezone,
served by area code 701 .
About ZIP code 58640
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 $298,200. Owner-occupancy sits near the national average at 70%.
Median household income is $95,664. 34% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is production, transportation, and material moving, with agriculture and mining as the leading industry. The average commute of 19 minutes is near the national average.
College attainment at 20% is below the national average, consistent with a trades and production-oriented local economy.
Notable community characteristics include a notable veteran presence at 11% of civilians, above the national average of 7%.
Overall, ZIP code 58640 reflects a community defined by a trades-oriented workforce, a strong veteran community, and a significant Social Security-dependent population.
58640 ZIP code map
View map of 58640
Cities in ZIP code 58640
Below are the cities the US Postal Service accepts for ZIP code 58640. Using any city not on this list may result in mail delivery delays.
Nearby ZIP codes
Demographics
updated 05/2026
Population
Total population
1,226
Population density
3 / sq mi
State FIPS
38
County FIPS
025
Geography
Land area
437.43 sq mi
Water area
1.15 sq mi
Latitude
47.5044
Longitude
-102.6789
Timezone
Mountain (MT)
Area code
701
Economics
updated 05/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
30.5%
30.4%
37.8%
$50k – $100k
23.4%
29.2%
32.8%
$100k – $200k
37.9%
31.2%
23.3%
Over $200k
8.2%
9.2%
6.0%
Demographics & statistics
$95,664
Median household income
$298,200
Median home value
$1,010
Median monthly rent
19.7%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 239 19.5% 18 and over 987 80.5% 65 and over 224 18.3% Median age 43.5 years
Race & ethnicity
American Indian / Alaska Native
2.5%
Group Count % White 1,112 85.8% Two or more races 78 6% Hispanic or Latino 70 5.4% American Indian / Alaska Native 33 2.5% Other race 3 0.2%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
30.5%
30.4%
37.8%
$50k – $100k
23.4%
29.2%
32.8%
$100k – $200k
37.9%
31.2%
23.3%
Over $200k
8.2%
9.2%
6.0%
Range % of households Under $10k 1.5% $10k–$15k 2.5% $15k–$25k 3.5% $25k–$35k 8.3% $35k–$50k 8.1% $50k–$75k 6.2% $75k–$100k 24.7% $100k–$150k 21.4% $150k–$200k 8.5% $200k+ 15.2% Median income $95,664
Housing
Housing overview
Metric Value Median home value $298,200 Median rent / month $1,010 Owner occupied 69.9% Renter occupied 30.1% Vacant 28.1% Single-family detached 63.4% Large apartment buildings 4.3% Mobile homes 19.1% Median rooms 6.1 Avg household size (owned) 2.83
Year built
Era % 2020 or later 0.0% 2010–2019 19.9% 2000–2009 9.6% 1990–1999 1.0% 1980–1989 15.2% 1970–1979 11.8% 1960–1969 19.4% 1950–1959 4.2% 1940–1949 3.4% 1939 or earlier 15.4%
Bedrooms
Size % of units No bedroom (studio) 18.8% 1 bedroom 5.8% 2 bedrooms 9.3% 3 bedrooms 33.9% 4 bedrooms 21.4% 5+ bedrooms 10.8%
Vehicles per household
Vehicles % of households No vehicle 2.5% 1 vehicle 26.2% 2 vehicles 24.7% 3 or more 46.6%
Heating fuel
Fuel type % Utility gas 41.8% Electricity 34.1% Propane / LP gas 18.9% Fuel oil 3.1% No fuel used 0.8%
Households & families
Household type Count % Married-couple family 239 49.7% Cohabiting couple 0 0.0% Male householder, no spouse 194 40.3% Female householder, no spouse 48 10.0% Households with children under 18 104 21.6% Households with seniors (65+) 136 28.3% Average household size 2.41
Marital status
Status Male Female Never married 26.9% 14.1% Married 62.5% 54.9% Separated 0.0% 0.0% Widowed 0.0% 15.5% Divorced 10.6% 15.5%
Education
Less than 9th grade
10.6%
Some college, no degree
19.0%
Graduate / professional
4.3%
Metric % HS diploma or higher 85.7% Bachelor's or higher 19.7%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 28 11.2% Kindergarten 2 0.8% Elementary school 122 48.8% High school 36 14.4% College / grad school 62 24.8%
Employment
Industry of employment
Agriculture & mining
18.3%
Arts, food & hospitality
9.7%
Education & healthcare
9.3%
Transportation & utilities
4.9%
Public administration
4.4%
Finance & real estate
2.0%
Professional & management
1.4%
Occupation
Category % Management, business & arts 24.1% Service 12.6% Sales & office 15.3% Natural resources & construction 15.4% Production & transportation 32.6%
Employment type
Type % Private sector 80.1% Government 6.8% Self-employed 13.1% Unpaid family workers 0.0%
Commute
Method % Drive alone 61.3% Carpool 7.1% Public transit 0.0% Walk 10.3% Work from home 19.9% Other means 1.4% Avg commute (minutes) 18.5
Poverty
Married-couple families
0.8%
Female-led households
0.0%
Income support
Source % of households Social Security 33.9% Retirement income 10.2% Supplemental Security 8.1% Cash public assistance 2.9% Food stamps / SNAP 2.9%
Health indicators
Condition % Obesity 34.4% High blood pressure 34.0% High cholesterol 33.7% Diabetes 10.1% Heart disease 7.4% Stroke 3.3% Asthma 8.8% Arthritis 27.0% Kidney disease 3.0% Pulmonary disease 6.5% Cancer 7.9%
Behavior / access % Smoking 18.0% Binge drinking 19.5% No physical activity 25.3% Less than 7 hrs sleep 30.1% Depression 17.4% Fair or poor health 12.6% Poor mental health 11.7% Poor physical health 9.3% No health insurance 10.2% Visited doctor (checkup) 71.0% Visited dentist 63.7% Cholesterol screening 89.7% Teeth loss 13.0%
Veterans & disability
Veterans Count % Civilian veterans 110 11.1%
Disability % Any disability 16.2% Under 18 2.5% 18–64 years 15.4% 65 and over 40.0%
Health insurance coverage
Type % Private insurance 78.8% Public insurance 21.6% No insurance 14.2% Uninsured under 19 30.7%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 1,152 94.0% Spanish 154 13.4% Other Indo-European 99 8.6% Asian & Pacific Islander 8 0.7% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 1,168 95.3% Born in same state 1,168 95.3% Born in different state 756 61.7% Foreign born 0 0.0% Naturalized citizen 58 4.7% Not a US citizen 0 0.0%
Ancestry
Ancestry Count % Polish 172 14% French 117 9.5% Italian 100 8.2% Arab 20 1.6%
Ancestry Count % English 13 1.1% German 8 0.7% Dutch 4 0.3%
Technology access
Metric % of households Computer access 39.2% Internet access 98.5%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 58640
What city is ZIP code 58640 in?
ZIP code 58640 is primarily assigned to Killdeer, North Dakota.
What county is ZIP code 58640 in?
ZIP code 58640 falls within Dunn County, North Dakota.
Does ZIP code 58640 have a large veteran population?
11% of civilians in ZIP code 58640 are veterans, above the national average of ~7%.
What is the population of ZIP code 58640?
ZIP code 58640 has an estimated population of 1,226 residents, with a density of 3 people per square mile.
What is the typical home value in ZIP code 58640?
The median home value in ZIP code 58640 is $298,200.
What is the median household income in ZIP code 58640?
The median household income in ZIP code 58640 is $95,664, above the national median of ~$75,000.
What timezone is ZIP code 58640 in?
ZIP code 58640 observes the MST timezone.
Need the complete ZIP code database?
Download all 42,000+ US ZIP codes — Excel, CSV, or Access. Includes lat/lng, county FIPS & timezone.
Download database →
