Summit ZIP Codes — Roberts County, SD

There is one unique ZIP code in Summit, South Dakota and it is 57266. Area code: 605.

ZIP codes

127.26

sq mi land

1.45

sq mi water

605

area code

Summit, SD ZIP code map

About Summit, SD

Summit is a quaint city located in South Dakota, nestled within Roberts County. Known for its serene atmosphere and friendly community, it offers a unique blend of rural charm and local culture. The city encompasses a notable territory characterized by both land and water, making it an intriguing destination within the state.

Location & geography

Summit is positioned in the northeastern part of South Dakota, approximately 16 miles from the city of Sisseton, which lies to its south. It is surrounded by several other cities, including Wilmot to the west and Ortley to the east, contributing to a connected regional network. The city itself covers a total land area of 127.26 square miles, complemented by a water area of 1.45 square miles, showcasing a diverse mix of landscapes.

Community & economy

The character of Summit is defined by its close-knit community that fosters a welcoming environment for residents and visitors alike. The city is home to various industries, with agriculture playing a significant role in the local economy, alongside small businesses that serve everyday needs. Daily life in Summit is shaped by community events and gatherings that celebrate the region's culture and heritage.

Transportation

Summit is accessible via Highway 10, making it convenient for travelers and residents to move in and out of the city. The nearest major airport is located in Watertown, approximately 48 miles away, providing regional flight services. Public transit options within the city may be limited, emphasizing the need for personal vehicles for most transportation needs.

History

Founded in the late 19th century, Summit has a rich history tied to the development of agriculture in the Roberts County area. The city flourished due to its strategic location and the establishment of key transportation routes that facilitated the movement of goods. Over the years, Summit has evolved while maintaining its small-town charm, reflecting a blend of old and new influences.

Did you know?

A surprising fact about Summit is that it is home to a remarkable number of open spaces and parks, providing residents with ample opportunities for outdoor activities. Additionally, the city's close proximity to the Sisseton Wahpeton Oyate Reservation enriches its cultural landscape, adding depth to its community identity.

ZIP codes for Summit, SD (1)

ZIP code	City	County	Map
57266	Summit	Roberts	View map

Demographics & statistics

571

Population

30.2

Median age

$62,292

Median household income

$25,702

Per capita income

$103,800

Median home value

$708

Median monthly rent

73.3%

Home ownership

21.2%

Poverty rate

3.8%

Unemployment

184

Housing units

14.9%

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	190	33.3%
18 and over	381	66.7%
65 and over	61	10.7%
Median age	30.2 years

Race & ethnicity

White 77%

American Indian / Alaska Native 16.2%

Two or more races 3.1%

Hispanic or Latino 1.4%

Other race 1.2%

Black or African American 0.5%

Asian 0.5%

Group	Count	%
White	446	77%
American Indian / Alaska Native	94	16.2%
Two or more races	18	3.1%
Hispanic or Latino	8	1.4%
Other race	7	1.2%
Black or African American	3	0.5%
Asian	3	0.5%

Household income

Under $10k 4.7%

$10k–$15k 7.9%

$15k–$25k 5.2%

$25k–$35k 12.6%

$35k–$50k 9.4%

$50k–$75k 16.8%

$75k–$100k 14.1%

$100k–$150k 23.6%

$150k–$200k 1.6%

$200k+ 4.2%

Range	% of households
Under $10k	4.7%
$10k–$15k	7.9%
$15k–$25k	5.2%
$25k–$35k	12.6%
$35k–$50k	9.4%
$50k–$75k	16.8%
$75k–$100k	14.1%
$100k–$150k	23.6%
$150k–$200k	1.6%
$200k+	4.2%
Median income	$62,292

Housing

Home values

Under $50k 15.0%

$50k–$100k 33.6%

$100k–$150k 10.7%

$150k–$200k 7.9%

$200k–$300k 9.3%

$300k–$500k 17.1%

$500k–$1M 3.6%

$1M+ 2.9%

Housing overview

Metric	Value
Median home value	$103,800
Median rent / month	$708
Owner occupied	73.3%
Renter occupied	26.7%
Vacant	18.7%
Single-family detached	88.5%
Large apartment buildings	0.0%
Mobile homes	7.7%
Median rooms	6.2
Avg household size (owned)	3.03

Year built

Era	%
2020 or later	0.0%
2010–2019	3.0%
2000–2009	8.9%
1990–1999	4.7%
1980–1989	6.4%
1970–1979	14.5%
1960–1969	5.1%
1950–1959	3.8%
1940–1949	11.9%
1939 or earlier	41.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.9%
1 bedroom	7.2%
2 bedrooms	18.7%
3 bedrooms	42.6%
4 bedrooms	23.0%
5+ bedrooms	7.7%

Vehicles per household

Vehicles	% of households
No vehicle	2.1%
1 vehicle	21.5%
2 vehicles	27.7%
3 or more	48.7%

Heating fuel

Fuel type	%
Utility gas	3.1%
Electricity	37.2%
Propane / LP gas	51.8%
Fuel oil	4.7%
Wood	2.1%

Households & families

Household type	Count	%
Married-couple family	109	57.1%
Cohabiting couple	7	3.7%
Male householder, no spouse	39	20.4%
Female householder, no spouse	36	18.8%
Households with children under 18	72	37.7%
Households with seniors (65+)	50	26.2%
Average household size	2.99

Marital status

Status	Male	Female
Never married	36.4%	21.3%
Married	50.4%	61.2%
Separated	0.0%	0.0%
Widowed	1.3%	11.8%
Divorced	11.8%	5.6%

Education

Less than 9th grade 4.1%

Some HS, no diploma 4.8%

HS graduate 37.8%

Some college, no degree 18.1%

Associate's degree 20.3%

Bachelor's degree 12.1%

Graduate / professional 2.9%

Metric	%
HS diploma or higher	91.1%
Bachelor's or higher	14.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	24	14.6%
Kindergarten	7	4.3%
Elementary school	82	50.0%
High school	46	28.0%
College / grad school	5	3.0%

Employment

Industry of employment

Education & healthcare 24.9%

Agriculture & mining 17.3%

Retail trade 13.4%

Construction 10.5%

Manufacturing 9.7%

Arts, food & hospitality 7.6%

Finance & real estate 5.1%

Transportation & utilities 2.9%

Other services 2.9%

Public administration 2.5%

Wholesale trade 2.2%

Professional & management 0.7%

Information 0.4%

Occupation

Category	%
Management, business & arts	44.0%
Service	16.2%
Sales & office	15.5%
Natural resources & construction	11.2%
Production & transportation	13.0%

Employment type

Type	%
Private sector	65.7%
Government	19.1%
Self-employed	13.7%
Unpaid family workers	1.4%

Commute

Method	%
Drive alone	79.2%
Carpool	4.4%
Public transit	0.0%
Walk	6.9%
Other means	0.0%
Avg commute (minutes)	24.7

Poverty

All people 21.2%

Under 18 years 27.4%

18 and over 18.1%

Married-couple families 11.0%

Female-led households 22.2%

Income support

Source	% of households
Social Security	27.7%
Retirement income	11.5%
Supplemental Security	1.6%
Cash public assistance	0.5%
Food stamps / SNAP	8.4%

Health indicators

Condition	%
High blood pressure	33.1%
High cholesterol	30.1%
Heart disease	7.7%
Stroke	3.8%
Asthma	9.7%
Arthritis	24.5%
Kidney disease	3.3%
Pulmonary disease	7.9%
Cancer	6.4%

Behavior / access	%
Binge drinking	20.3%
No physical activity	29.0%
Less than 7 hrs sleep	30.6%
Fair or poor health	15.7%
Poor mental health	12.3%
Poor physical health	11.2%
No health insurance	15.5%
Visited doctor (checkup)	74.3%
Visited dentist	61.1%
Cholesterol screening	86.2%
Teeth loss	20.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	27	7.1%

Disability	%
Any disability	4.4%
Under 18	1.6%
18–64 years	2.8%
65 and over	21.3%

Health insurance coverage

Type	%
Private insurance	66.7%
Public insurance	25.9%
Uninsured under 19	11.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	508	89.0%
Spanish	13	2.6%
Other Indo-European	2	0.4%
Asian & Pacific Islander	6	1.2%
Other languages	3	0.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	566	99.1%
Born in same state	564	98.8%
Born in different state	459	80.4%
Foreign born	2	0.4%
Naturalized citizen	5	0.9%
Not a US citizen	3	60.0%

Ancestry

Ancestry	Count	%
Polish	77	13.5%
Italian	37	6.5%
English	14	2.5%

Ancestry	Count	%
French	6	1.1%
Arab	6	1.1%
Dutch	3	0.5%

Technology access

Metric	% of households
Computer access	33.5%
Internet access	90.1%

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

Frequently asked questions

What ZIP codes does Summit, SD have?

Summit, SD has one ZIP code: 57266. Each ZIP code serves a distinct delivery area within the city and surrounding region.