55609 ZIP Code — Knife River, MN
Lake County, Minnesota
ZIP code 55609 is located in Knife River, Minnesota, within Lake County. It covers approximately 2.49 square miles and serves a population of 135 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 218.
135
population
2.49
sq mi land
Standard
ZIP type
Central (CT)
timezone
55609 ZIP code map
Cities in ZIP code 55609
Below are the cities the US Postal Service accepts for ZIP code 55609. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Knife River | Acceptable |
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 135 |
| Population density | 54 / sq mi |
| State FIPS | 27 |
| County FIPS | 075 |
| Geography | |
|---|---|
| Land area | 2.49 sq mi |
| Water area | 0.02 sq mi |
| Latitude | 46.9678 |
| Longitude | -91.7837 |
| Timezone | Central (CT) |
| Area code | 218 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 0.0% | 36.1% | 33.6% |
| $50k – $100k | 27.5% | 36.0% | 31.5% |
| $100k – $200k | 72.5% | 25.0% | 26.5% |
| Over $200k | 0.0% | 3.0% | 8.5% |
Demographics & statistics
135
Population
54
People per sq mi
87.4
Median age
$73,958
Median household income
$36,710
Per capita income
$537,500
Median home value
$0
Median monthly rent
100.0%
Home ownership
9.6%
Poverty rate
0.0%
Unemployment
142
Housing units
41.5%
Bachelor's or higher
Age distribution
Male
Female
23
65–74
24
4
75–84
4
40
85+
40
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 0 | 0.0% |
| 18 and over | 135 | 100.0% |
| 65 and over | 135 | 100.0% |
| Median age | 87.4 years | |
Race & ethnicity
White
100%
| Group | Count | % |
|---|---|---|
| White | 135 | 100% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 0.0% | 36.1% | 33.6% |
| $50k – $100k | 27.5% | 36.0% | 31.5% |
| $100k – $200k | 72.5% | 25.0% | 26.5% |
| Over $200k | 0.0% | 3.0% | 8.5% |
Under $10k
16.9%
$15k–$25k
10.4%
$50k–$75k
39.0%
$75k–$100k
24.7%
$100k–$150k
9.1%
| Range | % of households |
|---|---|
| Under $10k | 16.9% |
| $15k–$25k | 10.4% |
| $50k–$75k | 39.0% |
| $75k–$100k | 24.7% |
| $100k–$150k | 9.1% |
| Median income | $73,958 |
Housing
Home values
$150k–$200k
11.7%
$300k–$500k
36.4%
$500k–$1M
51.9%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $537,500 |
| Median rent / month | $0 |
| Owner occupied | 100.0% |
| Renter occupied | 0.0% |
| Vacant | 45.8% |
| Single-family detached | 100.0% |
| Large apartment buildings | 0.0% |
| Mobile homes | 0.0% |
| Median rooms | 5.2 |
| Avg household size (owned) | 1.75 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 10.6% |
| 2000–2009 | 0.0% |
| 1990–1999 | 35.2% |
| 1980–1989 | 7.0% |
| 1970–1979 | 21.1% |
| 1960–1969 | 11.3% |
| 1950–1959 | 9.2% |
| 1940–1949 | 0.0% |
| 1939 or earlier | 5.6% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.0% |
| 1 bedroom | 0.0% |
| 2 bedrooms | 49.3% |
| 3 bedrooms | 50.7% |
| 4 bedrooms | 0.0% |
| 5+ bedrooms | 0.0% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 0.0% |
| 1 vehicle | 27.3% |
| 2 vehicles | 50.6% |
| 3 or more | 22.1% |
Heating fuel
| Fuel type | % |
|---|---|
| Electricity | 39.0% |
| Propane / LP gas | 44.2% |
| Fuel oil | 16.9% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 56 | 72.7% |
| Cohabiting couple | 0 | 0.0% |
| Male householder, no spouse | 8 | 10.4% |
| Female householder, no spouse | 13 | 16.9% |
| Households with children under 18 | 0 | 0.0% |
| Households with seniors (65+) | 77 | 100.0% |
| Average household size | 1.75 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 0.0% | 0.0% |
| Married | 88.1% | 80.9% |
| Separated | 0.0% | 0.0% |
| Widowed | 0.0% | 19.1% |
| Divorced | 11.9% | 0.0% |
Education
Less than 9th grade
0.0%
Some HS, no diploma
0.0%
HS graduate
45.9%
Some college, no degree
12.6%
Associate's degree
0.0%
Bachelor's degree
19.3%
Graduate / professional
22.2%
| Metric | % |
|---|---|
| HS diploma or higher | 100.0% |
| Bachelor's or higher | 41.5% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 0 | 0.0% |
| Kindergarten | 0 | 0.0% |
| Elementary school | 0 | 0.0% |
| High school | 0 | 0.0% |
| College / grad school | 0 | 0.0% |
Employment
Industry of employment
Occupation
| Category | % |
|---|---|
| Management, business & arts | 0.0% |
| Service | 0.0% |
| Sales & office | 0.0% |
| Natural resources & construction | 0.0% |
| Production & transportation | 0.0% |
Employment type
| Type | % |
|---|---|
| Private sector | 0.0% |
| Government | 0.0% |
| Self-employed | 0.0% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 0.0% |
| Carpool | 0.0% |
| Public transit | 0.0% |
| Walk | 0.0% |
| Work from home | 0.0% |
| Other means | 0.0% |
| Avg commute (minutes) | 0.0 |
Poverty
All people
9.6%
Under 18 years
0.0%
18 and over
9.6%
Married-couple families
0.0%
Female-led households
0.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 100.0% |
| Retirement income | 72.7% |
| Supplemental Security | 39.0% |
| Cash public assistance | 0.0% |
| Food stamps / SNAP | 0.0% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 35.5% |
| High blood pressure | 32.6% |
| High cholesterol | 32.4% |
| Diabetes | 9.6% |
| Heart disease | 6.7% |
| Stroke | 3.0% |
| Asthma | 8.6% |
| Arthritis | 26.4% |
| Kidney disease | 2.9% |
| Pulmonary disease | 5.6% |
| Cancer | 8.3% |
| Behavior / access | % |
|---|---|
| Smoking | 15.3% |
| Binge drinking | 18.7% |
| No physical activity | 18.8% |
| Less than 7 hrs sleep | 28.7% |
| Depression | 20.8% |
| Fair or poor health | 11.0% |
| Poor mental health | 12.0% |
| Poor physical health | 9.2% |
| No health insurance | 8.2% |
| Visited doctor (checkup) | 71.7% |
| Visited dentist | 70.4% |
| Cholesterol screening | 92.7% |
| Teeth loss | 8.6% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 42 | 31.1% |
| Disability | % |
|---|---|
| Any disability | 28.1% |
| Under 18 | 0.0% |
| 18–64 years | 0.0% |
| 65 and over | 28.1% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 77.8% |
| Public insurance | 100.0% |
| No insurance | 0.0% |
| Uninsured under 19 | 0.0% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 135 | 100.0% |
| 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) | 135 | 100.0% |
| Born in same state | 135 | 100.0% |
| Born in different state | 128 | 94.8% |
| Foreign born | 0 | 0.0% |
| Naturalized citizen | 0 | 0.0% |
| Not a US citizen | 0 | 0.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Polish | 62 | 45.9% |
| Ancestry | Count | % |
|---|---|---|
| Italian | 7 | 5.2% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 57.0% |
| Internet access | 83.1% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 55609
What city is ZIP code 55609 in?
ZIP code 55609 is primarily assigned to Knife River, Minnesota.
What county is ZIP code 55609 in?
ZIP code 55609 falls within Lake County, Minnesota.
Does ZIP code 55609 have an older population?
100% of residents in ZIP code 55609 are 65 or older, above the national average of ~17%.
Does ZIP code 55609 have a large retiree population?
100% of households in ZIP code 55609 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 55609 have a large veteran population?
31% of civilians in ZIP code 55609 are veterans, above the national average of ~7%.
What is the typical home value in ZIP code 55609?
The median home value in ZIP code 55609 is $537,500.
What timezone is ZIP code 55609 in?
ZIP code 55609 observes the CST timezone.