Saint Onge ZIP Codes — Lawrence County, SD

There is one unique ZIP code in Saint Onge, South Dakota and it is 57779. Area code: 605.
1
ZIP codes
41.06
sq mi land
0.04
sq mi water
605
area code
Saint Onge, SD ZIP code map

About Saint Onge, SD

Saint Onge is a small, unincorporated community located in the beautiful state of South Dakota. Nestled within Lawrence County, this serene area offers a peaceful escape from larger cities while still being rich in local culture and history. Known for its proximity to the Black Hills, Saint Onge is surrounded by stunning landscapes and outdoor recreational opportunities.

Location & geography

Saint Onge is situated near the foothills of the Black Hills, providing residents and visitors alike with picturesque views and outdoor activities. The community is approximately 19 miles northwest of the larger city of Deadwood, 20 miles from Lead, and about 30 miles from Rapid City. Covering a land area of 41.06 square miles and a water area of just 0.04 square miles, the terrain is primarily characterized by rolling hills and lush vegetation.

Community & economy

The character of Saint Onge is that of a close-knit, rural community where residents enjoy a slower pace of life. The local economy is small, with agriculture and related industries playing a significant role in daily life. Community events often revolve around seasonal celebrations and outdoor activities, promoting a strong sense of togetherness among residents.

Transportation

Saint Onge is accessible via South Dakota Highway 34, which runs through the area, making it convenient for residents to travel to nearby cities. The nearest major airport is Rapid City Regional Airport, located approximately 30 miles away, providing further connectivity for travelers. Public transit options are limited, so residents typically rely on personal vehicles for transportation.

History

Saint Onge was established in the late 19th century and has remained a small, unincorporated community since its founding. The area was originally known for its mining activities during the Gold Rush era, attracting settlers and opportunists to the region. Despite its size, the community has maintained its historical charm and ties to the agriculture and tourism industries.

Did you know?

A lesser-known fact about Saint Onge is that it is situated near some popular tourist attractions in the Black Hills, which include hiking trails and historical sites. Additionally, the town shares its unique name with Saint Onge, a nearby fishing lake that brings outdoor enthusiasts to the area.

ZIP codes for Saint Onge, SD (1)
ZIP code City County Map
57779 Saint Onge Lawrence View map

Demographics & statistics

267
Population
58.3
Median age
$0
Median household income
$81,441
Per capita income
$245,700
Median home value
$0
Median monthly rent
100.0%
Home ownership
0.0%
Poverty rate
0.0%
Unemployment
171
Housing units
46.8%
Bachelor's or higher

Age distribution

Male Female
32
45–54
83
18
55–59
47
18
60–64
45
7
75–84
17
← Male
Female →

Age summary

GroupCount%
Under 1800.0%
18 and over267100.0%
65 and over249.0%
Median age58.3 years

Race & ethnicity

White 100%
GroupCount%
White267100%

Household income

$50k–$75k 50.7%
$100k–$150k 3.6%
$200k+ 45.7%
Range% of households
$50k–$75k50.7%
$100k–$150k3.6%
$200k+45.7%
Median income$0

Housing

Home values

$150k–$200k 3.6%
$200k–$300k 96.4%

Housing overview

MetricValue
Median home value$245,700
Median rent / month$0
Owner occupied100.0%
Renter occupied0.0%
Vacant19.3%
Single-family detached100.0%
Large apartment buildings0.0%
Mobile homes0.0%
Median rooms10.0
Avg household size (owned)1.93

Year built

Era%
2020 or later0.0%
2010–201936.8%
2000–20090.0%
1990–19990.0%
1980–19890.0%
1970–19794.1%
1960–19690.0%
1950–195919.3%
1940–19490.0%
1939 or earlier39.8%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom0.0%
2 bedrooms19.3%
3 bedrooms2.9%
4 bedrooms77.8%
5+ bedrooms0.0%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle0.0%
2 vehicles50.7%
3 or more49.3%

Heating fuel

Fuel type%
Utility gas45.7%
Electricity5.1%
Propane / LP gas49.3%

Households & families

Household typeCount%
Married-couple family138100.0%
Cohabiting couple00.0%
Male householder, no spouse00.0%
Female householder, no spouse00.0%
Households with children under 1800.0%
Households with seniors (65+)128.7%
Average household size1.93

Marital status

StatusMaleFemale
Never married0.0%0.0%
Married100.0%100.0%
Separated0.0%0.0%
Widowed0.0%0.0%
Divorced0.0%0.0%

Education

Less than 9th grade 0.0%
Some HS, no diploma 0.0%
HS graduate 28.8%
Some college, no degree 24.3%
Associate's degree 0.0%
Bachelor's degree 46.8%
Graduate / professional 0.0%
Metric%
HS diploma or higher100.0%
Bachelor's or higher46.8%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool00.0%
Kindergarten00.0%
Elementary school00.0%
High school00.0%
College / grad school00.0%

Employment

Industry of employment

Construction 35.4%
Wholesale trade 35.4%
Professional & management 29.2%

Occupation

Category%
Management, business & arts64.6%
Service0.0%
Sales & office35.4%
Natural resources & construction0.0%
Production & transportation0.0%

Employment type

Type%
Private sector100.0%
Government0.0%
Self-employed0.0%
Unpaid family workers0.0%

Commute

Method%
Drive alone100.0%
Carpool0.0%
Public transit0.0%
Walk0.0%
Other means0.0%
Avg commute (minutes)0.0

Poverty

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

Income support

Source% of households
Social Security8.7%
Retirement income3.6%
Supplemental Security0.0%
Cash public assistance0.0%
Food stamps / SNAP0.0%

Health indicators

Condition%
High blood pressure30.4%
High cholesterol30.8%
Heart disease6.9%
Stroke3.0%
Asthma8.5%
Arthritis25.5%
Kidney disease2.9%
Pulmonary disease5.6%
Cancer7.7%
Behavior / access%
Binge drinking20.7%
No physical activity20.1%
Less than 7 hrs sleep26.6%
Fair or poor health10.4%
Poor mental health10.2%
Poor physical health8.3%
No health insurance10.5%
Visited doctor (checkup)72.6%
Visited dentist69.6%
Cholesterol screening89.7%
Teeth loss12.6%

Veterans & disability

VeteransCount%
Civilian veterans00.0%
Disability%
Any disability0.0%
Under 180.0%
18–64 years0.0%
65 and over0.0%

Health insurance coverage

Type%
Private insurance94.8%
Public insurance9.0%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only267100.0%
Spanish00.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)267100.0%
Born in same state267100.0%
Born in different state12747.6%
Foreign born00.0%
Naturalized citizen00.0%
Not a US citizen00.0%

Ancestry

AncestryCount%
Italian12847.9%

Technology access

Metric% of households
Computer access51.7%
Internet access96.4%

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

Frequently asked questions
What ZIP codes does Saint Onge, SD have?
Saint Onge, SD has one ZIP code: 57779. Each ZIP code serves a distinct delivery area within the city and surrounding region.
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