56257 ZIP Code — Marietta, MN

Lac Qui Parle County, Minnesota

ZIP code 56257 is located in Marietta, Minnesota, within Lac Qui Parle County. It covers approximately 92.10 square miles and serves a population of 453 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 320.

About ZIP code 56257

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $65,000. Owner-occupancy is high at 82%, well above the national average.

Median household income is $61,000. Poverty affects 21% of residents, above the national average. SNAP benefit usage at 17% of households reflects economic stress in the area. 51% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. The average commute of 24 minutes is near the national average.

College attainment at 13% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 56257 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, high homeownership, a significant Social Security-dependent population, and elevated reliance on food assistance.

453

population

92.10

sq mi land

Standard

ZIP type

Central (CT)

timezone

56257 ZIP code map

Cities in ZIP code 56257

Below are the cities the US Postal Service accepts for ZIP code 56257. Using any city not on this list may result in mail delivery delays.

City	Status
Marietta	Acceptable
Marietta	Preferred

Nearby ZIP codes

57259 Revillo (8.9 mi) 57237 Gary (11.7 mi) 56212 Bellingham (13.3 mi) 56256 Madison (14.2 mi) 57252 Milbank (18.5 mi) 57216 Big Stone City (19.7 mi) 56220 Canby (20 mi)

Demographics updated 05/2026

Population
Total population	453
Population density	5 / sq mi
State FIPS	27
County FIPS	073

Geography
Land area	92.10 sq mi
Water area	0.67 sq mi
Latitude	44.9793
Longitude	-96.3954
Timezone	Central (CT)
Area code	320

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	48.7%	44.0%	33.6%
$50k – $100k	37.4%	35.0%	31.5%
$100k – $200k	12.6%	16.6%	26.5%
Over $200k	1.3%	4.4%	8.5%

Demographics & statistics

453

Population

People per sq mi

47.4

Median age

$61,000

Median household income

$28,719

Per capita income

$65,000

Median home value

$938

Median monthly rent

81.7%

Home ownership

21.1%

Poverty rate

5.1%

Unemployment

207

Housing units

13.4%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	108	23.8%
18 and over	345	76.2%
65 and over	138	30.5%
Median age	47.4 years

Race & ethnicity

White 96.5%

Two or more races 2.6%

Hispanic or Latino 0.9%

Group	Count	%
White	441	96.5%
Two or more races	12	2.6%
Hispanic or Latino	4	0.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	48.7%	44.0%	33.6%
$50k – $100k	37.4%	35.0%	31.5%
$100k – $200k	12.6%	16.6%	26.5%
Over $200k	1.3%	4.4%	8.5%

Under $10k 8.1%

$10k–$15k 7.5%

$15k–$25k 11.8%

$25k–$35k 8.1%

$35k–$50k 5.9%

$50k–$75k 20.4%

$75k–$100k 18.8%

$100k–$150k 14.5%

$150k–$200k 3.2%

$200k+ 1.6%

Range	% of households
Under $10k	8.1%
$10k–$15k	7.5%
$15k–$25k	11.8%
$25k–$35k	8.1%
$35k–$50k	5.9%
$50k–$75k	20.4%
$75k–$100k	18.8%
$100k–$150k	14.5%
$150k–$200k	3.2%
$200k+	1.6%
Median income	$61,000

Housing

Home values

Under $50k 38.2%

$50k–$100k 27.6%

$100k–$150k 9.2%

$150k–$200k 3.9%

$200k–$300k 14.5%

$300k–$500k 3.3%

$500k–$1M 3.3%

Housing overview

Metric	Value
Median home value	$65,000
Median rent / month	$938
Owner occupied	81.7%
Renter occupied	18.3%
Vacant	22.8%
Single-family detached	98.8%
Large apartment buildings	0.0%
Mobile homes	1.2%
Median rooms	7.0
Avg household size (owned)	2.39

Year built

Era	%
2020 or later	0.0%
2010–2019	0.8%
2000–2009	3.7%
1990–1999	1.7%
1980–1989	2.1%
1970–1979	17.4%
1960–1969	6.6%
1950–1959	4.1%
1940–1949	9.5%
1939 or earlier	53.9%

Bedrooms

Size	% of units
No bedroom (studio)	2.9%
1 bedroom	5.4%
2 bedrooms	19.1%
3 bedrooms	41.9%
4 bedrooms	25.7%
5+ bedrooms	5.0%

Vehicles per household

Vehicles	% of households
No vehicle	1.6%
1 vehicle	30.1%
2 vehicles	34.9%
3 or more	33.3%

Heating fuel

Fuel type	%
Utility gas	8.1%
Electricity	28.5%
Propane / LP gas	59.1%
Fuel oil	1.1%
Wood	3.2%

Households & families

Household type	Count	%
Married-couple family	89	47.8%
Cohabiting couple	16	8.6%
Male householder, no spouse	42	22.6%
Female householder, no spouse	39	21.0%
Households with children under 18	41	22.0%
Households with seniors (65+)	90	48.4%
Average household size	2.44

Marital status

Status	Male	Female
Never married	36.1%	41.4%
Married	47.0%	49.5%
Separated	0.0%	0.0%
Widowed	0.5%	5.6%
Divorced	16.4%	3.5%

Education

Less than 9th grade 0.0%

Some HS, no diploma 4.2%

HS graduate 45.9%

Some college, no degree 24.8%

Associate's degree 11.7%

Bachelor's degree 10.1%

Graduate / professional 3.3%

Metric	%
HS diploma or higher	95.8%
Bachelor's or higher	13.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	14	13.5%
Kindergarten	5	4.8%
Elementary school	34	32.7%
High school	46	44.2%
College / grad school	5	4.8%

Employment

Industry of employment

Agriculture & mining 21.6%

Education & healthcare 13.2%

Manufacturing 9.6%

Transportation & utilities 9.6%

Construction 9.0%

Retail trade 9.0%

Professional & management 7.2%

Other services 4.8%

Public administration 4.8%

Arts, food & hospitality 4.2%

Information 3.0%

Finance & real estate 3.0%

Wholesale trade 1.2%

Occupation

Category	%
Management, business & arts	38.3%
Service	21.0%
Sales & office	8.4%
Natural resources & construction	18.6%
Production & transportation	13.8%

Employment type

Type	%
Private sector	61.7%
Government	16.8%
Self-employed	21.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	68.5%
Carpool	10.3%
Public transit	0.0%
Walk	10.3%
Work from home	10.9%
Other means	0.0%
Avg commute (minutes)	24.1

Poverty

All people 21.1%

Under 18 years 46.0%

18 and over 13.9%

Married-couple families 4.5%

Female-led households 68.8%

Income support

Source	% of households
Social Security	50.5%
Retirement income	21.5%
Supplemental Security	4.3%
Cash public assistance	4.8%
Food stamps / SNAP	17.2%

Health indicators

Condition	%
Obesity	33.7%
High blood pressure	37.7%
High cholesterol	35.5%
Diabetes	11.9%
Heart disease	8.8%
Stroke	4.0%
Asthma	8.7%
Arthritis	29.6%
Kidney disease	3.6%
Pulmonary disease	7.4%
Cancer	9.3%

Behavior / access	%
Smoking	18.5%
Binge drinking	17.0%
No physical activity	23.6%
Less than 7 hrs sleep	27.5%
Depression	20.7%
Fair or poor health	14.1%
Poor mental health	12.2%
Poor physical health	11.0%
No health insurance	10.4%
Visited doctor (checkup)	73.5%
Visited dentist	67.6%
Cholesterol screening	92.4%
Teeth loss	12.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	26	7.5%

Disability	%
Any disability	9.7%
Under 18	1.9%
18–64 years	8.2%
65 and over	18.1%

Health insurance coverage

Type	%
Private insurance	61.8%
Public insurance	65.3%
No insurance	0.9%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	433	95.6%
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)	449	99.1%
Born in same state	448	98.9%
Born in different state	315	69.5%
Foreign born	1	0.2%
Naturalized citizen	4	0.9%
Not a US citizen	2	50.0%

Ancestry

Ancestry	Count	%
Polish	146	32.2%
French	32	7.1%
Italian	24	5.3%
English	11	2.4%

Ancestry	Count	%
Arab	10	2.2%
Dutch	4	0.9%
Irish	3	0.7%
German	2	0.4%

Technology access

Metric	% of households
Computer access	41.1%
Internet access	79.0%

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

Frequently asked questions about ZIP code 56257

What city is ZIP code 56257 in?

ZIP code 56257 is primarily assigned to Marietta, Minnesota.

What county is ZIP code 56257 in?

ZIP code 56257 falls within Lac Qui Parle County, Minnesota.

Does ZIP code 56257 have an older population?

31% of residents in ZIP code 56257 are 65 or older, above the national average of ~17%.

Does ZIP code 56257 have a large retiree population?

51% of households in ZIP code 56257 receive Social Security income, suggesting a significant retiree or disability population.

What is the poverty rate in ZIP code 56257?

21% of residents in ZIP code 56257 live below the poverty line, above the national average.

How educated is the population of ZIP code 56257?

13% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What timezone is ZIP code 56257 in?

ZIP code 56257 observes the CST timezone.