57756 ZIP Code — Manderson, SD

Oglala Lakota County, South Dakota

ZIP code 57756 is located in Manderson, South Dakota, within Oglala Lakota County. It covers approximately 66.42 square miles and serves a population of 681 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 605.

About ZIP code 57756

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Renters make up the majority at 91%, typical of denser urban areas.

The dominant occupation class is production, transportation, and material moving, with public administration as the leading industry.

Health indicators show elevated rates of obesity (45%), diabetes (16%), smoking (41%) compared to national benchmarks. 33% of residents lack health insurance, above the national average.

Overall, ZIP code 57756 reflects a community defined by economic challenges above the national average, a significant Social Security-dependent population, and elevated reliance on food assistance.

681

population

66.42

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

57756 ZIP code map

Cities in ZIP code 57756

Below are the cities the US Postal Service accepts for ZIP code 57756. Using any city not on this list may result in mail delivery delays.

City	Status
Manderson	Acceptable

Demographics updated 06/2026

Population
Total population	681
Population density	10 / sq mi
State FIPS	46
County FIPS	102

Geography
Land area	66.42 sq mi
Water area	0.00 sq mi
Latitude	43.3057
Longitude	-102.3941
Timezone	Mountain (MT)
Area code	605

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	77.4%	66.6%	41.7%
$50k – $100k	14.8%	23.1%	33.8%
$100k – $200k	0.0%	7.0%	20.1%
Over $200k	7.7%	3.3%	4.4%

Demographics & statistics

681

Population

People per sq mi

32.8

Median age

Median household income

$4,357

Per capita income

Median home value

$539

Median monthly rent

8.8%

Home ownership

97.9%

Poverty rate

6.8%

Unemployment

Housing units

0.0%

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

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	212	31.1%
18 and over	469	68.9%
65 and over	80	11.7%
Median age	32.8 years

Race & ethnicity

American Indian / Alaska Native 100%

Group	Count	%
American Indian / Alaska Native	681	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	77.4%	66.6%	41.7%
$50k – $100k	14.8%	23.1%	33.8%
$100k – $200k	0.0%	7.0%	20.1%
Over $200k	7.7%	3.3%	4.4%

Under $10k 51.6%

$15k–$25k 18.2%

$25k–$35k 21.4%

$50k–$75k 8.8%

Range	% of households
Under $10k	51.6%
$15k–$25k	18.2%
$25k–$35k	21.4%
$50k–$75k	8.8%
Median income	$0

Housing

Home values

$150k–$200k 100.0%

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$539
Owner occupied	8.8%
Renter occupied	91.2%
Vacant	21.7%
Single-family detached	74.4%
Large apartment buildings	0.0%
Mobile homes	21.2%
Median rooms	4.7
Avg household size (owned)	0.00

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	21.2%
1990–1999	33.0%
1980–1989	16.3%
1970–1979	15.8%
1960–1969	0.0%
1950–1959	0.0%
1940–1949	13.8%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	24.1%
2 bedrooms	20.7%
3 bedrooms	32.5%
4 bedrooms	15.8%
5+ bedrooms	6.9%

Vehicles per household

Vehicles	% of households
No vehicle	44.7%
1 vehicle	46.5%
2 vehicles	8.8%
3 or more	0.0%

Heating fuel

Fuel type	%
Propane / LP gas	74.8%
Wood	25.2%

Households & families

Household type	Count	%
Married-couple family	6	3.8%
Cohabiting couple	0	0.0%
Male householder, no spouse	14	8.8%
Female householder, no spouse	139	87.4%
Households with children under 18	100	62.9%
Households with seniors (65+)	80	50.3%
Average household size	4.28

Marital status

Status	Male	Female
Never married	73.7%	68.8%
Married	2.5%	2.2%
Separated	0.0%	0.0%
Widowed	0.0%	16.7%
Divorced	23.7%	12.3%

Education

Less than 9th grade 3.6%

Some HS, no diploma 16.5%

HS graduate 42.7%

Some college, no degree 33.6%

Associate's degree 3.6%

Bachelor's degree 0.0%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	79.9%
Bachelor's or higher	0.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	28	30.4%
Kindergarten	0	0.0%
Elementary school	15	16.3%
High school	25	27.2%
College / grad school	24	26.1%

Employment

Industry of employment

Public administration 71.0%

Construction 20.3%

Education & healthcare 8.7%

Occupation

Category	%
Management, business & arts	0.0%
Service	8.7%
Sales & office	34.8%
Natural resources & construction	20.3%
Production & transportation	36.2%

Employment type

Type	%
Private sector	8.7%
Government	91.3%
Self-employed	0.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	56.5%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	8.7%
Other means	34.8%
Avg commute (minutes)	0.0

Poverty

All people 97.9%

Under 18 years 100.0%

18 and over 97.0%

Married-couple families 100.0%

Female-led households 100.0%

Income support

Source	% of households
Social Security	35.8%
Retirement income	0.0%
Supplemental Security	39.6%
Cash public assistance	35.8%
Food stamps / SNAP	76.7%

Health indicators

Condition	%
Obesity	45.2%
High blood pressure	32.9%
High cholesterol	24.0%
Diabetes	16.4%
Heart disease	8.8%
Stroke	6.0%
Asthma	15.2%
Arthritis	24.4%
Kidney disease	4.5%
Pulmonary disease	11.4%
Cancer	4.3%

Behavior / access	%
Smoking	41.1%
Binge drinking	19.2%
No physical activity	39.1%
Less than 7 hrs sleep	35.2%
Depression	20.2%
Fair or poor health	29.6%
Poor mental health	20.4%
Poor physical health	18.3%
No health insurance	20.2%
Visited doctor (checkup)	73.5%
Visited dentist	42.1%
Cholesterol screening	77.4%
Teeth loss	43.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	0	0.0%

Disability	%
Any disability	11.2%
Under 18	0.0%
18–64 years	4.9%
65 and over	71.3%

Health insurance coverage

Type	%
Private insurance	0.0%
Public insurance	66.7%
No insurance	33.3%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	543	79.7%
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)	681	100.0%
Born in same state	681	100.0%
Born in different state	659	96.8%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Technology access

Metric	% of households
Computer access	23.3%
Internet access	39.6%

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

Frequently asked questions about ZIP code 57756

What city is ZIP code 57756 in?

ZIP code 57756 is primarily assigned to Manderson, South Dakota.

What county is ZIP code 57756 in?

ZIP code 57756 falls within Oglala Lakota County, South Dakota.

What is the poverty rate in ZIP code 57756?

98% of residents in ZIP code 57756 live below the poverty line, above the national average.

Is ZIP code 57756 mostly rentals?

91% of occupied units in ZIP code 57756 are renter-occupied.

Is ZIP code 57756 family-oriented?

31% of residents in ZIP code 57756 are under 18, reflecting a younger, family-oriented community.

What are the health statistics for ZIP code 57756?

Health data for ZIP code 57756 shows elevated rates of obesity (45%) and diabetes (16%) and smoking (41%) compared to national benchmarks.

What timezone is ZIP code 57756 in?

ZIP code 57756 observes the MST timezone.