56431 ZIP Code — Aitkin, MN

Aitkin County, Minnesota

ZIP code 56431 is located in Aitkin, Minnesota, within Aitkin County. It covers approximately 462.81 square miles and serves a population of 8,958 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 218.

About ZIP code 56431

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $243,400. Owner-occupancy is high at 85%, well above the national average.

Median household income is $59,590. 55% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 23 minutes is near the national average.

College attainment at 21% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 56431 reflects a community defined by high homeownership and a significant Social Security-dependent population.

8,958

population

462.81

sq mi land

Standard

ZIP type

Central (CT)

timezone

56431 ZIP code map

Cities in ZIP code 56431

Below are the cities the US Postal Service accepts for ZIP code 56431. Using any city not on this list may result in mail delivery delays.

City	Status
Aitkin	Preferred

Nearby ZIP codes

56444 Deerwood (11.7 mi) 56450 Garrison (16.4 mi) 56455 Ironton (17 mi) 56441 Crosby (17.4 mi) 56469 Palisade (19.2 mi)

Demographics updated 05/2026

Population
Total population	8,958
Population density	19 / sq mi
State FIPS	27
County FIPS	001

Geography
Land area	462.81 sq mi
Water area	127.58 sq mi
Latitude	46.4555
Longitude	-93.6414
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	49.5%	49.5%	33.6%
$50k – $100k	32.0%	33.0%	31.5%
$100k – $200k	16.2%	15.1%	26.5%
Over $200k	2.2%	2.5%	8.5%

Demographics & statistics

8,958

Population

People per sq mi

57.3

Median age

$59,590

Median household income

$34,326

Per capita income

$243,400

Median home value

$826

Median monthly rent

84.8%

Home ownership

11.8%

Poverty rate

4.3%

Unemployment

6,501

Housing units

20.9%

Bachelor's or higher

Age distribution

Male Female

134

Under 5

135

218

5–9

221

212

10–14

215

234

15–19

237

181

20–24

184

303

25–34

307

364

35–44

369

455

45–54

462

356

55–59

362

430

60–64

436

831

65–74

843

543

75–84

551

186

85+

189

← Male

Female →

Age summary

Group	Count	%
Under 18	1,475	16.5%
18 and over	7,483	83.5%
65 and over	3,143	35.1%
Median age	57.3 years

Race & ethnicity

White 93.3%

Two or more races 2.3%

Hispanic or Latino 2.1%

Other race 1%

American Indian / Alaska Native 0.6%

Black or African American 0.4%

Asian 0.1%

Group	Count	%
White	8,544	93.3%
Two or more races	210	2.3%
Hispanic or Latino	196	2.1%
Other race	95	1%
American Indian / Alaska Native	55	0.6%
Black or African American	40	0.4%
Asian	10	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	49.5%	49.5%	33.6%
$50k – $100k	32.0%	33.0%	31.5%
$100k – $200k	16.2%	15.1%	26.5%
Over $200k	2.2%	2.5%	8.5%

Under $10k 5.4%

$10k–$15k 6.9%

$15k–$25k 10.1%

$25k–$35k 7.6%

$35k–$50k 12.8%

$50k–$75k 18.2%

$75k–$100k 13.5%

$100k–$150k 16.7%

$150k–$200k 5.4%

$200k+ 3.5%

Range	% of households
Under $10k	5.4%
$10k–$15k	6.9%
$15k–$25k	10.1%
$25k–$35k	7.6%
$35k–$50k	12.8%
$50k–$75k	18.2%
$75k–$100k	13.5%
$100k–$150k	16.7%
$150k–$200k	5.4%
$200k+	3.5%
Median income	$59,590

Housing

Home values

Under $50k 4.8%

$50k–$100k 6.6%

$100k–$150k 9.2%

$150k–$200k 16.8%

$200k–$300k 26.1%

$300k–$500k 28.0%

$500k–$1M 7.3%

$1M+ 1.2%

Housing overview

Metric	Value
Median home value	$243,400
Median rent / month	$826
Owner occupied	84.8%
Renter occupied	15.2%
Vacant	45.7%
Single-family detached	85.1%
Large apartment buildings	3.4%
Mobile homes	8.0%
Median rooms	5.8
Avg household size (owned)	2.36

Year built

Era	%
2020 or later	0.3%
2010–2019	5.5%
2000–2009	19.8%
1990–1999	14.9%
1980–1989	12.9%
1970–1979	15.7%
1960–1969	9.0%
1950–1959	7.2%
1940–1949	3.9%
1939 or earlier	10.8%

Bedrooms

Size	% of units
No bedroom (studio)	2.3%
1 bedroom	8.3%
2 bedrooms	29.5%
3 bedrooms	39.1%
4 bedrooms	17.0%
5+ bedrooms	3.8%

Vehicles per household

Vehicles	% of households
No vehicle	6.1%
1 vehicle	28.6%
2 vehicles	39.2%
3 or more	26.1%

Heating fuel

Fuel type	%
Utility gas	20.7%
Electricity	19.0%
Propane / LP gas	45.0%
Fuel oil	1.7%
Wood	10.9%
No fuel used	0.6%

Households & families

Household type	Count	%
Married-couple family	1,945	50.5%
Cohabiting couple	213	5.5%
Male householder, no spouse	773	20.1%
Female householder, no spouse	917	23.8%
Households with children under 18	659	17.1%
Households with seniors (65+)	2,055	53.4%
Average household size	2.27

Marital status

Status	Male	Female
Never married	25.2%	22.1%
Married	55.3%	52.7%
Separated	0.9%	0.7%
Widowed	5.7%	13.4%
Divorced	13.0%	11.2%

Education

Less than 9th grade 1.8%

Some HS, no diploma 4.4%

HS graduate 35.8%

Some college, no degree 23.3%

Associate's degree 13.7%

Bachelor's degree 14.4%

Graduate / professional 6.5%

Metric	%
HS diploma or higher	93.7%
Bachelor's or higher	20.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	67	4.4%
Kindergarten	103	6.7%
Elementary school	669	43.8%
High school	437	28.6%
College / grad school	250	16.4%

Employment

Industry of employment

Education & healthcare 26.0%

Retail trade 11.5%

Construction 10.6%

Arts, food & hospitality 9.5%

Manufacturing 8.4%

Professional & management 7.8%

Public administration 6.1%

Other services 5.6%

Finance & real estate 4.8%

Transportation & utilities 3.8%

Agriculture & mining 2.9%

Wholesale trade 2.4%

Information 0.6%

Occupation

Category	%
Management, business & arts	34.5%
Service	18.5%
Sales & office	20.8%
Natural resources & construction	13.9%
Production & transportation	12.4%

Employment type

Type	%
Private sector	75.1%
Government	15.0%
Self-employed	9.5%
Unpaid family workers	0.4%

Commute

Method	%
Drive alone	75.8%
Carpool	9.6%
Public transit	0.1%
Walk	2.2%
Work from home	11.0%
Other means	1.4%
Avg commute (minutes)	22.6

Poverty

All people 11.8%

Under 18 years 14.9%

18 and over 11.2%

Married-couple families 3.4%

Female-led households 27.6%

Income support

Source	% of households
Social Security	55.4%
Retirement income	39.0%
Supplemental Security	4.4%
Cash public assistance	3.1%
Food stamps / SNAP	6.2%

Health indicators

Condition	%
Obesity	35.1%
High blood pressure	39.7%
High cholesterol	35.6%
Diabetes	12.5%
Heart disease	9.3%
Stroke	4.3%
Asthma	9.0%
Arthritis	31.7%
Kidney disease	3.9%
Pulmonary disease	8.1%
Cancer	9.6%

Behavior / access	%
Smoking	19.4%
Binge drinking	16.6%
No physical activity	25.0%
Less than 7 hrs sleep	27.7%
Depression	22.1%
Fair or poor health	15.2%
Poor mental health	12.5%
Poor physical health	11.6%
No health insurance	10.8%
Visited doctor (checkup)	72.9%
Visited dentist	63.9%
Cholesterol screening	92.0%
Teeth loss	12.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	776	10.4%

Disability	%
Any disability	19.5%
Under 18	5.8%
18–64 years	14.7%
65 and over	33.0%

Health insurance coverage

Type	%
Private insurance	65.6%
Public insurance	55.8%
No insurance	5.4%
Uninsured under 19	5.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	8,689	97.0%
Spanish	25	0.3%
Other Indo-European	11	0.1%
Asian & Pacific Islander	8	0.1%
Other languages	3	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	8,893	99.3%
Born in same state	8,846	98.7%
Born in different state	7,022	78.4%
Foreign born	47	0.5%
Naturalized citizen	65	0.7%
Not a US citizen	32	49.2%

Ancestry

Ancestry	Count	%
Polish	1,624	18.1%
Italian	1,030	11.5%
French	663	7.4%
Arab	363	4.1%
English	230	2.6%

Ancestry	Count	%
Dutch	104	1.2%
German	94	1%
Irish	15	0.2%
Norwegian	14	0.2%

Technology access

Metric	% of households
Computer access	43.0%
Internet access	90.2%

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

Frequently asked questions about ZIP code 56431

What city is ZIP code 56431 in?

ZIP code 56431 is primarily assigned to Aitkin, Minnesota.

What county is ZIP code 56431 in?

ZIP code 56431 falls within Aitkin County, Minnesota.

Does ZIP code 56431 have an older population?

35% of residents in ZIP code 56431 are 65 or older, above the national average of ~17%.

Does ZIP code 56431 have a large retiree population?

55% of households in ZIP code 56431 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 56431 mostly owner-occupied?

85% of occupied units in ZIP code 56431 are owner-occupied, well above the national average.

Does ZIP code 56431 have a large veteran population?

10% of civilians in ZIP code 56431 are veterans, above the national average of ~7%.

What timezone is ZIP code 56431 in?

ZIP code 56431 observes the CST timezone.