56731 ZIP Code — Humboldt, MN
Kittson County, Minnesota
ZIP code 56731 is located in Humboldt, Minnesota, within Kittson County. It covers approximately 38.46 square miles and serves a population of 116 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 218.
116
population
38.46
sq mi land
Standard
ZIP type
Central (CT)
timezone
56731 ZIP code map
Cities in ZIP code 56731
Below are the cities the US Postal Service accepts for ZIP code 56731. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Humboldt | Acceptable |
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 116 |
| Population density | 3 / sq mi |
| State FIPS | 27 |
| County FIPS | 069 |
| Geography | |
|---|---|
| Land area | 38.46 sq mi |
| Water area | 0.01 sq mi |
| Latitude | 48.9001 |
| Longitude | -97.1067 |
| Timezone | Central (CT) |
| Area code | 218 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 35.4% | 43.1% | 33.6% |
| $50k – $100k | 56.3% | 37.0% | 31.5% |
| $100k – $200k | 8.3% | 17.3% | 26.5% |
| Over $200k | 0.0% | 2.6% | 8.5% |
Demographics & statistics
116
Population
3
People per sq mi
52.1
Median age
$0
Median household income
$23,674
Per capita income
$120,400
Median home value
$0
Median monthly rent
94.2%
Home ownership
13.8%
Poverty rate
2.9%
Unemployment
55
Housing units
19.3%
Bachelor's or higher
Age distribution
Male
Female
3
Under 5
4
1
5–9
1
5
10–14
9
4
15–19
6
6
25–34
9
2
35–44
3
10
45–54
17
2
55–59
2
6
60–64
10
4
65–74
7
2
75–84
2
0
85+
1
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 33 | 28.4% |
| 18 and over | 83 | 71.6% |
| 65 and over | 16 | 13.8% |
| Median age | 52.1 years | |
Race & ethnicity
White
100%
| Group | Count | % |
|---|---|---|
| White | 116 | 100% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 35.4% | 43.1% | 33.6% |
| $50k – $100k | 56.3% | 37.0% | 31.5% |
| $100k – $200k | 8.3% | 17.3% | 26.5% |
| Over $200k | 0.0% | 2.6% | 8.5% |
$10k–$15k
28.8%
$15k–$25k
9.6%
$35k–$50k
9.6%
$50k–$75k
30.8%
$75k–$100k
17.3%
$100k–$150k
3.8%
| Range | % of households |
|---|---|
| $10k–$15k | 28.8% |
| $15k–$25k | 9.6% |
| $35k–$50k | 9.6% |
| $50k–$75k | 30.8% |
| $75k–$100k | 17.3% |
| $100k–$150k | 3.8% |
| Median income | $0 |
Housing
Home values
Under $50k
8.2%
$50k–$100k
10.2%
$100k–$150k
38.8%
$150k–$200k
4.1%
$200k–$300k
30.6%
$300k–$500k
2.0%
$500k–$1M
6.1%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $120,400 |
| Median rent / month | $0 |
| Owner occupied | 94.2% |
| Renter occupied | 5.8% |
| Vacant | 10.3% |
| Single-family detached | 77.6% |
| Large apartment buildings | 0.0% |
| Mobile homes | 0.0% |
| Median rooms | 7.4 |
| Avg household size (owned) | 2.14 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 0.0% |
| 2000–2009 | 1.7% |
| 1990–1999 | 0.0% |
| 1980–1989 | 24.1% |
| 1970–1979 | 24.1% |
| 1960–1969 | 0.0% |
| 1950–1959 | 27.6% |
| 1940–1949 | 17.2% |
| 1939 or earlier | 5.2% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.0% |
| 1 bedroom | 0.0% |
| 2 bedrooms | 5.2% |
| 3 bedrooms | 58.6% |
| 4 bedrooms | 36.2% |
| 5+ bedrooms | 0.0% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 0.0% |
| 1 vehicle | 26.9% |
| 2 vehicles | 23.1% |
| 3 or more | 50.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Electricity | 5.8% |
| Propane / LP gas | 61.5% |
| Fuel oil | 7.7% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 31 | 59.6% |
| Cohabiting couple | 0 | 0.0% |
| Male householder, no spouse | 5 | 9.6% |
| Female householder, no spouse | 16 | 30.8% |
| Households with children under 18 | 22 | 42.3% |
| Households with seniors (65+) | 12 | 23.1% |
| Average household size | 2.23 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 2.8% | 42.1% |
| Married | 86.1% | 52.6% |
| Separated | 0.0% | 0.0% |
| Widowed | 2.8% | 5.3% |
| Divorced | 8.3% | 0.0% |
Education
Less than 9th grade
0.0%
Some HS, no diploma
2.4%
HS graduate
55.4%
Some college, no degree
19.3%
Associate's degree
3.6%
Bachelor's degree
19.3%
Graduate / professional
0.0%
| Metric | % |
|---|---|
| HS diploma or higher | 97.6% |
| Bachelor's or higher | 19.3% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 8 | 24.2% |
| Kindergarten | 0 | 0.0% |
| Elementary school | 13 | 39.4% |
| High school | 12 | 36.4% |
| College / grad school | 0 | 0.0% |
Employment
Industry of employment
Agriculture & mining
34.8%
Education & healthcare
27.3%
Retail trade
15.2%
Professional & management
12.1%
Manufacturing
9.1%
Transportation & utilities
1.5%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 62.1% |
| Service | 1.5% |
| Sales & office | 24.2% |
| Natural resources & construction | 1.5% |
| Production & transportation | 10.6% |
Employment type
| Type | % |
|---|---|
| Private sector | 72.7% |
| Government | 19.7% |
| Self-employed | 7.6% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 50.0% |
| Carpool | 12.1% |
| Public transit | 0.0% |
| Walk | 0.0% |
| Work from home | 37.9% |
| Other means | 0.0% |
| Avg commute (minutes) | 19.0 |
Poverty
All people
13.8%
Under 18 years
0.0%
18 and over
19.3%
Married-couple families
3.2%
Female-led households
0.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 40.4% |
| Retirement income | 42.3% |
| Supplemental Security | 0.0% |
| Cash public assistance | 0.0% |
| Food stamps / SNAP | 0.0% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 34.8% |
| High blood pressure | 29.4% |
| High cholesterol | 30.2% |
| Diabetes | 9.0% |
| Heart disease | 5.7% |
| Stroke | 2.5% |
| Asthma | 8.4% |
| Arthritis | 21.9% |
| Kidney disease | 2.4% |
| Pulmonary disease | 5.0% |
| Cancer | 6.1% |
| Behavior / access | % |
|---|---|
| Smoking | 17.7% |
| Binge drinking | 20.2% |
| No physical activity | 18.8% |
| Less than 7 hrs sleep | 27.6% |
| Depression | 20.6% |
| Fair or poor health | 10.8% |
| Poor mental health | 12.4% |
| Poor physical health | 8.9% |
| No health insurance | 10.8% |
| Visited doctor (checkup) | 69.5% |
| Visited dentist | 68.7% |
| Cholesterol screening | 91.1% |
| Teeth loss | 9.6% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1 | 1.2% |
| Disability | % |
|---|---|
| Any disability | 20.7% |
| Under 18 | 0.0% |
| 18–64 years | 23.9% |
| 65 and over | 50.0% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 80.2% |
| Public insurance | 23.3% |
| No insurance | 15.5% |
| Uninsured under 19 | 36.4% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 109 | 94.0% |
| 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) | 116 | 100.0% |
| Born in same state | 115 | 99.1% |
| Born in different state | 55 | 47.4% |
| Foreign born | 1 | 0.9% |
| Naturalized citizen | 0 | 0.0% |
| Not a US citizen | 0 | 0.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Polish | 22 | 19% |
| French | 21 | 18.1% |
| Italian | 7 | 6% |
| Ancestry | Count | % |
|---|---|---|
| English | 2 | 1.7% |
| Arab | 1 | 0.9% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 44.8% |
| Internet access | 98.1% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 56731
What city is ZIP code 56731 in?
ZIP code 56731 is primarily assigned to Humboldt, Minnesota.
What county is ZIP code 56731 in?
ZIP code 56731 falls within Kittson County, Minnesota.
Is ZIP code 56731 mostly owner-occupied?
94% of occupied units in ZIP code 56731 are owner-occupied, well above the national average.
Does ZIP code 56731 have a large retiree population?
40% of households in ZIP code 56731 receive Social Security income, suggesting a significant retiree or disability population.
What is the typical home value in ZIP code 56731?
The median home value in ZIP code 56731 is $120,400.
What is the population of ZIP code 56731?
ZIP code 56731 has an estimated population of 116 residents, with a density of 3 people per square mile.
What timezone is ZIP code 56731 in?
ZIP code 56731 observes the CST timezone.