Mound City ZIP Codes — Campbell County, SD

There is one unique ZIP code in Mound City, South Dakota and it is 57646. Area code: 605.
1
ZIP codes
128.41
sq mi land
0.59
sq mi water
605
area code
Mound City, SD ZIP code map

About Mound City, SD

Mound City is a quaint town located in South Dakota, noted for its tranquil atmosphere and scenic landscapes. Nestled in Campbell County, it serves as a peaceful retreat in the heart of the Great Plains. The town exemplifies the charm of rural South Dakota, attracting visitors with its rich history and welcoming community.

Location & geography

Mound City is situated in the north-central part of South Dakota, providing residents and visitors with stunning views of the surrounding terrain. It is located approximately 20 miles from the larger community of Herreid and about 30 miles from Glenham, making it a quiet yet accessible place to live. The total land area of Mound City covers 128.41 square miles, with a small water area of 0.59 square miles that adds to its natural beauty.

Community & economy

The character of Mound City is defined by a close-knit community spirit, where neighbors often know each other by name. The local economy is supported by agriculture, small businesses, and tourism, providing essential services and products to residents and visitors alike. Daily life in Mound City is marked by a slower pace, where residents enjoy outdoor activities and local events that foster camaraderie.

Transportation

Transportation in Mound City is facilitated by several highways, including U.S. Route 83, which connects the town to nearby communities. The closest major airport is in Aberdeen, South Dakota, located roughly 70 miles to the southeast, providing regional access for air travel. While there is no public transit system in the town, residents rely on personal vehicles for their daily commuting needs.

History

Mound City was founded in the late 19th century, a result of the expansion of the railroad and agricultural development in the region. Historically, the town’s economy has been anchored in farming and agriculture, which still plays a pivotal role in the community today. Over the years, Mound City has hosted various local events that celebrate its heritage and connect residents to their past.

Did you know?

One little-known fact about Mound City is that it is named for the nearby geological features known as Indian mounds, which hold historical significance. Additionally, the town’s expansive land area means it offers ample space for outdoor recreational activities such as hunting and fishing.

ZIP codes for Mound City, SD (1)
ZIP code City County Map
57646 Mound City Campbell View map

Demographics & statistics

267
Population
39.1
Median age
$91,563
Median household income
$32,437
Per capita income
$109,400
Median home value
$558
Median monthly rent
93.5%
Home ownership
6.0%
Poverty rate
0.0%
Unemployment
149
Housing units
39.3%
Bachelor's or higher

Age distribution

Male Female
16
5–9
18
21
10–14
22
6
15–19
6
4
25–34
4
30
35–44
32
12
45–54
14
6
55–59
7
12
60–64
12
6
65–74
7
13
75–84
15
2
85+
2
← Male
Female →

Age summary

GroupCount%
Under 187728.8%
18 and over19071.2%
65 and over4516.9%
Median age39.1 years

Race & ethnicity

White 89.2%
Hispanic or Latino 4.3%
Two or more races 2.9%
Other race 2.2%
American Indian / Alaska Native 1.4%
GroupCount%
White24989.2%
Hispanic or Latino124.3%
Two or more races82.9%
Other race62.2%
American Indian / Alaska Native41.4%

Household income

Under $10k 8.3%
$15k–$25k 9.3%
$25k–$35k 7.4%
$35k–$50k 11.1%
$50k–$75k 8.3%
$75k–$100k 10.2%
$100k–$150k 15.7%
$150k–$200k 28.7%
$200k+ 0.9%
Range% of households
Under $10k8.3%
$15k–$25k9.3%
$25k–$35k7.4%
$35k–$50k11.1%
$50k–$75k8.3%
$75k–$100k10.2%
$100k–$150k15.7%
$150k–$200k28.7%
$200k+0.9%
Median income$91,563

Housing

Home values

Under $50k 29.7%
$50k–$100k 15.8%
$100k–$150k 45.5%
$150k–$200k 5.0%
$200k–$300k 4.0%

Housing overview

MetricValue
Median home value$109,400
Median rent / month$558
Owner occupied93.5%
Renter occupied6.5%
Vacant30.8%
Single-family detached81.4%
Large apartment buildings0.0%
Mobile homes17.9%
Median rooms5.9
Avg household size (owned)2.50

Year built

Era%
2020 or later0.0%
2010–20193.2%
2000–20091.9%
1990–19998.3%
1980–19890.6%
1970–197925.0%
1960–19697.7%
1950–19597.7%
1940–19495.1%
1939 or earlier40.4%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom10.3%
2 bedrooms21.8%
3 bedrooms35.9%
4 bedrooms31.4%
5+ bedrooms0.6%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle6.5%
2 vehicles27.8%
3 or more65.7%

Heating fuel

Fuel type%
Electricity48.1%
Propane / LP gas46.3%
Fuel oil1.9%
Wood3.7%

Households & families

Household typeCount%
Married-couple family8780.6%
Cohabiting couple32.8%
Male householder, no spouse1413.0%
Female householder, no spouse43.7%
Households with children under 183835.2%
Households with seniors (65+)3330.6%
Average household size2.47

Marital status

StatusMaleFemale
Never married8.9%15.0%
Married81.1%81.0%
Separated0.0%0.0%
Widowed3.3%3.0%
Divorced6.7%1.0%

Education

Less than 9th grade 4.5%
Some HS, no diploma 5.1%
HS graduate 23.6%
Some college, no degree 14.0%
Associate's degree 13.5%
Bachelor's degree 38.2%
Graduate / professional 1.1%
Metric%
HS diploma or higher90.4%
Bachelor's or higher39.3%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool00.0%
Kindergarten00.0%
Elementary school5979.7%
High school1520.3%
College / grad school00.0%

Employment

Industry of employment

Education & healthcare 26.6%
Agriculture & mining 21.1%
Finance & real estate 18.8%
Arts, food & hospitality 9.4%
Public administration 8.6%
Construction 3.9%
Retail trade 3.9%
Wholesale trade 3.1%
Transportation & utilities 2.3%
Professional & management 1.6%
Information 0.8%

Occupation

Category%
Management, business & arts53.1%
Service0.0%
Sales & office18.0%
Natural resources & construction11.7%
Production & transportation17.2%

Employment type

Type%
Private sector54.7%
Government36.7%
Self-employed8.6%
Unpaid family workers0.0%

Commute

Method%
Drive alone48.4%
Carpool1.6%
Public transit0.0%
Walk6.3%
Other means0.0%
Avg commute (minutes)32.4

Poverty

All people 6.0%
Under 18 years 5.2%
18 and over 6.3%
Married-couple families 3.4%
Female-led households 0.0%

Income support

Source% of households
Social Security31.5%
Retirement income24.1%
Supplemental Security0.0%
Cash public assistance0.0%
Food stamps / SNAP0.0%

Health indicators

Condition%
High blood pressure36.5%
High cholesterol35.4%
Heart disease8.5%
Stroke3.6%
Asthma8.2%
Arthritis28.0%
Kidney disease3.3%
Pulmonary disease6.7%
Cancer9.1%
Behavior / access%
Binge drinking17.5%
No physical activity22.7%
Less than 7 hrs sleep26.4%
Fair or poor health11.6%
Poor mental health9.1%
Poor physical health9.1%
No health insurance10.9%
Visited doctor (checkup)77.5%
Visited dentist70.8%
Cholesterol screening92.4%
Teeth loss12.1%

Veterans & disability

VeteransCount%
Civilian veterans52.6%
Disability%
Any disability4.1%
Under 180.0%
18–64 years4.1%
65 and over11.1%

Health insurance coverage

Type%
Private insurance88.4%
Public insurance18.4%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only267100.0%
Spanish93.4%
Other Indo-European93.4%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)25294.4%
Born in same state25294.4%
Born in different state17565.5%
Foreign born00.0%
Naturalized citizen155.6%
Not a US citizen00.0%

Ancestry

AncestryCount%
Polish114.1%
Irish83%
Arab41.5%
German20.7%
AncestryCount%
English10.4%
Italian10.4%
French10.4%

Technology access

Metric% of households
Computer access40.4%
Internet access99.1%

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

Frequently asked questions
What ZIP codes does Mound City, SD have?
Mound City, SD has one ZIP code: 57646. Each ZIP code serves a distinct delivery area within the city and surrounding region.
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