New Underwood ZIP Codes — Pennington County, SD

There is one unique ZIP code in New Underwood, South Dakota and it is 57761. Area code: 605.

ZIP codes

441.07

sq mi land

1.65

sq mi water

605

area code

New Underwood, SD ZIP code map

About New Underwood, SD

New Underwood is a small city located in South Dakota, specifically within Pennington County. Known for its charming atmosphere, New Underwood presents a tight-knit community feel amidst the stunning landscapes of the northern Great Plains. This quaint town boasts a variety of outdoor activities and a peaceful lifestyle that appeals to its residents and visitors alike.

Location & geography

Geographically, New Underwood is situated in western South Dakota, covering an expansive land area of 441.07 square miles and a water area of 1.65 square miles. The town is bordered by several nearby cities, including Rapid City, which is located approximately 25 miles to the west. The terrain surrounding New Underwood features the Prairie grasslands typical of the region, offering beautiful vistas and a range of natural resources.

Community & economy

The community in New Underwood is characterized by friendly residents and a strong sense of belonging that often draws people to smaller towns. Local industries include agriculture and some light manufacturing, which provide essential employment opportunities for its citizens. Daily life in New Underwood is enriched by community events, outdoor activities, and ample opportunities to connect with neighbors.

Transportation

Transportation options in New Underwood primarily include the use of highways, with South Dakota Highway 34 passing through the area, linking residents to other regional destinations. The nearest named airport is Rapid City Regional Airport, located about 30 miles to the west, offering convenient access for residents and visitors alike. While there are no major public transit systems in the city, local travel is typically conducted by personal vehicles.

History

New Underwood was established in the early 1900s and developed primarily as an agricultural community. Its economy has historically been centered around farming, but it has also seen some diversification into light industry over the years. Notable events in the town's history include the construction of vital infrastructure that has supported its growth and development.

Did you know?

One surprising fact about New Underwood is that it is home to a large number of outdoor recreational spaces, which attract nature enthusiasts from nearby urban areas. Additionally, the town has maintained its historic charm, preserving several buildings that reflect its rich origins.

ZIP codes for New Underwood, SD (1)

ZIP code	City	County	Map
57761	New Underwood	Pennington	View map

Demographics & statistics

1,188

Population

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

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%
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	%
High blood pressure	32.2%
High cholesterol	31.0%
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	%
Binge drinking	18.4%
No physical activity	21.7%
Less than 7 hrs sleep	27.8%
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%
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

What ZIP codes does New Underwood, SD have?

New Underwood, SD has one ZIP code: 57761. Each ZIP code serves a distinct delivery area within the city and surrounding region.