57761 ZIP Code — New Underwood, SD

Pennington County, South Dakota

ZIP code 57761 is located in New Underwood, South Dakota, within Pennington County. It covers approximately 441.07 square miles and serves a population of 1,188 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 605.

About ZIP code 57761

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $210,200. Owner-occupancy is high at 82%, well above the national average.

Median household income is $91,313. 31% 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 27 minutes is near the national average.

Educational attainment is near the national average, with 25% of residents holding a bachelor's degree or higher.

Overall, ZIP code 57761 reflects a community defined by high homeownership and a significant Social Security-dependent population.

1,188

population

441.07

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

57761 ZIP code map

Cities in ZIP code 57761

Below are the cities the US Postal Service accepts for ZIP code 57761. Using any city not on this list may result in mail delivery delays.

City	Status
New Underwood	Acceptable
New Underwood	Preferred

Nearby ZIP codes

57719 Box Elder (12.4 mi) 57791 Wasta (13.9 mi) 57725 Caputa (19.4 mi)

Demographics updated 05/2026

Population
Total population	1,188
Population density	3 / sq mi
State FIPS	46
County FIPS	103

Geography
Land area	441.07 sq mi
Water area	1.65 sq mi
Latitude	44.2114
Longitude	-102.7608
Timezone	Mountain (MT)
Area code	605

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	26.3%	42.3%	41.7%
$50k – $100k	37.5%	33.3%	33.8%
$100k – $200k	29.9%	19.2%	20.1%
Over $200k	6.3%	5.2%	4.4%

Demographics & statistics

1,188

Population

People per sq mi

39.7

Median age

$91,313

Median household income

$31,820

Per capita income

$210,200

Median home value

$791

Median monthly rent

82.1%

Home ownership

11.6%

Poverty rate

3.0%

Unemployment

385

Housing units

25.1%

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	356	30.0%
18 and over	832	70.0%
65 and over	198	16.7%
Median age	39.7 years

Race & ethnicity

White 81.7%

Two or more races 6.8%

Hispanic or Latino 4%

Other race 3.1%

American Indian / Alaska Native 2.7%

Black or African American 1.7%

Group	Count	%
White	1,012	81.7%
Two or more races	84	6.8%
Hispanic or Latino	50	4%
Other race	38	3.1%
American Indian / Alaska Native	33	2.7%
Black or African American	21	1.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	26.3%	42.3%	41.7%
$50k – $100k	37.5%	33.3%	33.8%
$100k – $200k	29.9%	19.2%	20.1%
Over $200k	6.3%	5.2%	4.4%

Under $10k 10.7%

$10k–$15k 1.7%

$15k–$25k 5.8%

$25k–$35k 2.0%

$35k–$50k 11.0%

$50k–$75k 8.6%

$75k–$100k 14.7%

$100k–$150k 35.4%

$150k–$200k 5.2%

$200k+ 4.9%

Range	% of households
Under $10k	10.7%
$10k–$15k	1.7%
$15k–$25k	5.8%
$25k–$35k	2.0%
$35k–$50k	11.0%
$50k–$75k	8.6%
$75k–$100k	14.7%
$100k–$150k	35.4%
$150k–$200k	5.2%
$200k+	4.9%
Median income	$91,313

Housing

Home values

Under $50k 6.3%

$50k–$100k 9.1%

$100k–$150k 11.6%

$150k–$200k 21.4%

$200k–$300k 22.5%

$300k–$500k 12.3%

$500k–$1M 8.8%

$1M+ 8.1%

Housing overview

Metric	Value
Median home value	$210,200
Median rent / month	$791
Owner occupied	82.1%
Renter occupied	17.9%
Vacant	22.4%
Single-family detached	70.7%
Large apartment buildings	3.4%
Mobile homes	24.2%
Median rooms	5.8
Avg household size (owned)	3.27

Year built

Era	%
2020 or later	0.0%
2010–2019	10.3%
2000–2009	15.2%
1990–1999	6.7%
1980–1989	17.2%
1970–1979	13.2%
1960–1969	9.6%
1950–1959	6.0%
1940–1949	4.9%
1939 or earlier	16.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.4%
1 bedroom	5.8%
2 bedrooms	18.3%
3 bedrooms	50.1%
4 bedrooms	16.1%
5+ bedrooms	9.2%

Vehicles per household

Vehicles	% of households
No vehicle	2.6%
1 vehicle	8.6%
2 vehicles	40.1%
3 or more	48.7%

Heating fuel

Fuel type	%
Utility gas	2.6%
Electricity	35.7%
Propane / LP gas	49.0%
Wood	12.1%
No fuel used	0.6%

Households & families

Household type	Count	%
Married-couple family	196	56.5%
Cohabiting couple	52	15.0%
Male householder, no spouse	25	7.2%
Female householder, no spouse	74	21.3%
Households with children under 18	140	40.3%
Households with seniors (65+)	95	27.4%
Average household size	3.29

Marital status

Status	Male	Female
Never married	23.9%	27.8%
Married	51.8%	47.4%
Separated	0.0%	1.8%
Widowed	1.2%	11.5%
Divorced	23.1%	11.5%

Education

Less than 9th grade 1.9%

Some HS, no diploma 2.3%

HS graduate 33.2%

Some college, no degree 16.7%

Associate's degree 20.8%

Bachelor's degree 13.2%

Graduate / professional 11.9%

Metric	%
HS diploma or higher	95.8%
Bachelor's or higher	25.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	48	12.7%
Kindergarten	9	2.4%
Elementary school	103	27.2%
High school	137	36.2%
College / grad school	81	21.4%

Employment

Industry of employment

Education & healthcare 26.1%

Construction 20.1%

Public administration 8.5%

Agriculture & mining 8.1%

Retail trade 8.1%

Transportation & utilities 6.8%

Other services 6.0%

Manufacturing 5.8%

Arts, food & hospitality 4.3%

Finance & real estate 2.7%

Wholesale trade 1.4%

Information 1.2%

Professional & management 0.8%

Occupation

Category	%
Management, business & arts	29.2%
Service	20.9%
Sales & office	20.3%
Natural resources & construction	15.9%
Production & transportation	13.7%

Employment type

Type	%
Private sector	75.2%
Government	13.7%
Self-employed	11.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	72.9%
Carpool	13.7%
Public transit	0.0%
Walk	0.0%
Work from home	13.3%
Other means	0.0%
Avg commute (minutes)	27.1

Poverty

All people 11.6%

Under 18 years 2.2%

18 and over 15.8%

Married-couple families 0.0%

Female-led households 10.9%

Income support

Source	% of households
Social Security	31.4%
Retirement income	20.2%
Supplemental Security	7.2%
Cash public assistance	1.4%
Food stamps / SNAP	14.1%

Health indicators

Condition	%
Obesity	31.7%
High blood pressure	32.2%
High cholesterol	31.0%
Diabetes	9.0%
Heart disease	7.0%
Stroke	3.0%
Asthma	8.8%
Arthritis	25.8%
Kidney disease	2.9%
Pulmonary disease	5.9%
Cancer	7.5%

Behavior / access	%
Smoking	17.9%
Binge drinking	18.4%
No physical activity	21.7%
Less than 7 hrs sleep	27.8%
Depression	16.2%
Fair or poor health	11.2%
Poor mental health	10.6%
Poor physical health	8.7%
No health insurance	11.2%
Visited doctor (checkup)	75.1%
Visited dentist	66.8%
Cholesterol screening	89.7%
Teeth loss	13.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	54	6.8%

Disability	%
Any disability	11.0%
Under 18	3.7%
18–64 years	11.8%
65 and over	25.3%

Health insurance coverage

Type	%
Private insurance	70.6%
Public insurance	25.5%
No insurance	15.0%
Uninsured under 19	12.6%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,113	93.7%
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)	1,163	97.9%
Born in same state	1,163	97.9%
Born in different state	808	68.0%
Foreign born	0	0.0%
Naturalized citizen	25	2.1%
Not a US citizen	25	100.0%

Ancestry

Ancestry	Count	%
Italian	228	19.2%
Dutch	131	11%
Arab	97	8.2%

Ancestry	Count	%
French	63	5.3%
Polish	48	4%
German	2	0.2%

Technology access

Metric	% of households
Computer access	29.2%
Internet access	93.9%

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

Frequently asked questions about ZIP code 57761

What city is ZIP code 57761 in?

ZIP code 57761 is primarily assigned to New Underwood, South Dakota.

What county is ZIP code 57761 in?

ZIP code 57761 falls within Pennington County, South Dakota.

Is ZIP code 57761 mostly owner-occupied?

82% of occupied units in ZIP code 57761 are owner-occupied, well above the national average.

What is the population of ZIP code 57761?

ZIP code 57761 has an estimated population of 1,188 residents, with a density of 3 people per square mile.

What is the typical home value in ZIP code 57761?

The median home value in ZIP code 57761 is $210,200.

What is the median household income in ZIP code 57761?

The median household income in ZIP code 57761 is $91,313, above the national median of ~$75,000.

What timezone is ZIP code 57761 in?

ZIP code 57761 observes the MST timezone.