De Smet ZIP Codes — Kingsbury County, SD

There is one unique ZIP code in De Smet, South Dakota and it is 57231. Area code: 605.
1
ZIP codes
249.28
sq mi land
12.85
sq mi water
605
area code
De Smet, SD ZIP code map

About De Smet, SD

De Smet is a charming city located in Kingsbury County, South Dakota. Known for its rich history and ties to famed author Laura Ingalls Wilder, De Smet offers a unique glimpse into pioneer life in the Midwest. With a strong sense of community and picturesque landscapes, De Smet is a welcoming destination for visitors and residents alike.

Location & geography

Nestled in the heart of South Dakota, De Smet covers a total land area of 249.28 square miles, complemented by 12.85 square miles of water. It is located approximately 30 miles west of the city of Brookings and 40 miles northwest of Sioux Falls. The area's terrain features a mix of open fields and small lakes, creating a peaceful rural atmosphere.

Community & economy

The character of De Smet is defined by its close-knit community and small-town charm, attracting families and retirees alike. Agriculture plays a significant role in the local economy, with many residents involved in farming and related industries. Daily life in De Smet is marked by community events, local businesses, and a strong appreciation for the area's history and natural beauty.

Transportation

De Smet is accessible via South Dakota Highway 25, which connects the city to nearby towns and cities. The nearest major airport is Sioux Falls Regional Airport, located about 40 miles away, providing residents and visitors with access to national and regional flights. Local transit options may include bus services, although personal vehicles are the primary mode of transportation in the area.

History

De Smet was founded in the late 19th century and quickly became known for its association with Laura Ingalls Wilder, who wrote about her experiences living in the region. The town served as a crucial supply point for settlers during the westward expansion, leading to the establishment of key industries such as agriculture and small business. Notable events in the city's history include the annual Laura Ingalls Wilder Pageant, which celebrates the life and works of the author.

Did you know?

One surprising fact about De Smet is that it is home to the Ingalls Homestead, which attracts tourists interested in Laura Ingalls Wilder's stories. The city also boasts a large, well-preserved historic district that showcases its rich pioneer heritage.

ZIP codes for De Smet, SD (1)
ZIP code City County Map
57231 De Smet Kingsbury View map

Demographics & statistics

1,733
Population
44.9
Median age
$70,625
Median household income
$34,880
Per capita income
$171,800
Median home value
$711
Median monthly rent
80.3%
Home ownership
10.8%
Poverty rate
0.0%
Unemployment
730
Housing units
22.5%
Bachelor's or higher

Age distribution

Male Female
83
Under 5
78
59
5–9
55
47
10–14
45
31
15–19
30
39
20–24
36
83
25–34
78
105
35–44
100
52
45–54
50
35
55–59
34
99
60–64
94
129
65–74
121
67
75–84
64
61
85+
58
← Male
Female →

Age summary

GroupCount%
Under 1842824.7%
18 and over1,30575.3%
65 and over50028.9%
Median age44.9 years

Race & ethnicity

White 97.9%
Two or more races 1.8%
Hispanic or Latino 0.1%
Other race 0.1%
GroupCount%
White1,69997.9%
Two or more races321.8%
Hispanic or Latino20.1%
Other race20.1%

Household income

Under $10k 3.5%
$10k–$15k 2.6%
$15k–$25k 6.9%
$25k–$35k 6.6%
$35k–$50k 18.8%
$50k–$75k 15.0%
$75k–$100k 15.6%
$100k–$150k 18.7%
$150k–$200k 7.3%
$200k+ 5.1%
Range% of households
Under $10k3.5%
$10k–$15k2.6%
$15k–$25k6.9%
$25k–$35k6.6%
$35k–$50k18.8%
$50k–$75k15.0%
$75k–$100k15.6%
$100k–$150k18.7%
$150k–$200k7.3%
$200k+5.1%
Median income$70,625

Housing

Home values

Under $50k 7.6%
$50k–$100k 23.0%
$100k–$150k 15.1%
$150k–$200k 9.1%
$200k–$300k 18.7%
$300k–$500k 17.1%
$500k–$1M 7.6%
$1M+ 1.8%

Housing overview

MetricValue
Median home value$171,800
Median rent / month$711
Owner occupied80.3%
Renter occupied19.7%
Vacant20.7%
Single-family detached79.9%
Large apartment buildings0.7%
Mobile homes11.6%
Median rooms6.4
Avg household size (owned)2.61

Year built

Era%
2020 or later0.0%
2010–20194.3%
2000–200913.2%
1990–199910.3%
1980–19893.5%
1970–197916.0%
1960–19698.3%
1950–195910.2%
1940–19495.5%
1939 or earlier28.8%

Bedrooms

Size% of units
No bedroom (studio)0.7%
1 bedroom3.5%
2 bedrooms23.1%
3 bedrooms43.0%
4 bedrooms19.1%
5+ bedrooms10.6%

Vehicles per household

Vehicles% of households
No vehicle0.6%
1 vehicle25.1%
2 vehicles32.7%
3 or more41.7%

Heating fuel

Fuel type%
Utility gas48.0%
Electricity23.0%
Propane / LP gas18.5%
Fuel oil0.4%
Wood3.9%
No fuel used2.3%

Households & families

Household typeCount%
Married-couple family38556.1%
Cohabiting couple334.8%
Male householder, no spouse12718.5%
Female householder, no spouse14120.6%
Households with children under 1817225.1%
Households with seniors (65+)28942.1%
Average household size2.45

Marital status

StatusMaleFemale
Never married21.0%17.5%
Married59.7%59.6%
Separated1.7%0.0%
Widowed3.5%14.3%
Divorced14.1%8.6%

Education

Less than 9th grade 4.2%
Some HS, no diploma 6.7%
HS graduate 43.7%
Some college, no degree 12.0%
Associate's degree 10.8%
Bachelor's degree 14.3%
Graduate / professional 8.2%
Metric%
HS diploma or higher89.1%
Bachelor's or higher22.5%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool165.8%
Kindergarten145.1%
Elementary school17262.1%
High school6423.1%
College / grad school114.0%

Employment

Industry of employment

Education & healthcare 22.6%
Agriculture & mining 18.0%
Manufacturing 13.9%
Wholesale trade 9.8%
Retail trade 6.9%
Arts, food & hospitality 5.5%
Public administration 5.5%
Professional & management 4.5%
Finance & real estate 3.8%
Other services 3.8%
Construction 2.6%
Transportation & utilities 2.0%
Information 1.3%

Occupation

Category%
Management, business & arts36.7%
Service19.7%
Sales & office16.9%
Natural resources & construction13.0%
Production & transportation13.6%

Employment type

Type%
Private sector70.4%
Government9.8%
Self-employed17.7%
Unpaid family workers2.1%

Commute

Method%
Drive alone79.9%
Carpool8.2%
Public transit0.0%
Walk4.4%
Other means0.6%
Avg commute (minutes)13.5

Poverty

All people 10.8%
Under 18 years 12.6%
18 and over 10.1%
Married-couple families 5.7%
Female-led households 5.6%

Income support

Source% of households
Social Security39.4%
Retirement income20.0%
Supplemental Security2.3%
Cash public assistance0.9%
Food stamps / SNAP4.8%

Health indicators

Condition%
High blood pressure35.6%
High cholesterol34.7%
Heart disease8.7%
Stroke3.8%
Asthma8.4%
Arthritis28.4%
Kidney disease3.5%
Pulmonary disease6.8%
Cancer9.6%
Behavior / access%
Binge drinking16.9%
No physical activity25.4%
Less than 7 hrs sleep26.1%
Fair or poor health12.0%
Poor mental health9.5%
Poor physical health9.3%
No health insurance11.6%
Visited doctor (checkup)77.6%
Visited dentist69.3%
Cholesterol screening91.2%
Teeth loss14.1%

Veterans & disability

VeteransCount%
Civilian veterans796.1%
Disability%
Any disability10.7%
Under 182.8%
18–64 years5.9%
65 and over26.6%

Health insurance coverage

Type%
Private insurance74.3%
Public insurance39.9%
Uninsured under 193.7%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only1,57290.7%
Spanish00.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)1,72799.7%
Born in same state1,72799.7%
Born in different state1,42382.1%
Foreign born00.0%
Naturalized citizen60.3%
Not a US citizen00.0%

Ancestry

AncestryCount%
Polish38222%
Italian26715.4%
French1297.4%
English995.7%
AncestryCount%
Dutch844.8%
Arab291.7%
German40.2%

Technology access

Metric% of households
Computer access39.6%
Internet access88.2%

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

Frequently asked questions
What ZIP codes does De Smet, SD have?
De Smet, SD has one ZIP code: 57231. Each ZIP code serves a distinct delivery area within the city and surrounding region.
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