Oacoma ZIP Codes — Lyman County, SD

There is one unique ZIP code in Oacoma, South Dakota and it is 57365. Area code: 605.

ZIP codes

62.47

sq mi land

9.53

sq mi water

605

area code

Oacoma, SD ZIP code map

About Oacoma, SD

Oacoma, South Dakota, is a charming town located in Lyman County. Known for its scenic beauty and close-knit community, it offers a peaceful atmosphere for residents and visitors alike. The town, with a single ZIP code of 57365, is a perfect destination for those looking to experience small-town life in the expansive landscape of South Dakota.

Location & geography

Nestled in central South Dakota, Oacoma is conveniently situated near the Missouri River, which provides stunning views and recreational opportunities. The nearest cities include Chamberlain, just two miles away, with other nearby towns such as Kimball, 24 miles to the south, and Murdo, approximately 41 miles to the west. The town encompasses a land area of 62.47 square miles, complemented by a water area of 9.53 square miles, showcasing a diverse terrain of plains and waterways.

Community & economy

The community of Oacoma is characterized by its welcoming residents, who take pride in their hometown. Many local businesses cater to the tourism industry, which thrives due to the town's proximity to the Missouri River. Daily life here is punctuated by community events, outdoor activities, and a strong sense of camaraderie among neighbors.

Transportation

Oacoma is easily accessible via U.S. Highway 16, linking travelers to larger cities and destinations across South Dakota. The nearest major airport is the Pierre Regional Airport, about 90 miles away, while local transit options are limited, encouraging a car-dependent lifestyle. Visitors often enjoy the scenic drives that highlight the region's natural beauty.

History

Oacoma was founded in the late 19th century, originally serving as a trading post for travelers and settlers along the Missouri River. Key industries historically included agriculture and tourism, with fishing and boating being popular pastimes that continue to draw visitors. Notable events in its history include the growth of recreational activities along the river, which have shaped Oacoma's identity over the years.

Did you know?

One surprising fact about Oacoma is that it is part of a larger cultural region, rich in Native American history, which can be explored through local museums and landmarks. Additionally, the town is known for its beautiful sunsets over the Missouri River, drawing photographers and nature lovers alike.

ZIP codes for Oacoma, SD (1)

ZIP code	City	County	Map
57365	Oacoma	Lyman	View map

Demographics & statistics

522

Population

55.5

Median age

$68,750

Median household income

$39,237

Per capita income

$208,300

Median home value

$744

Median monthly rent

79.1%

Home ownership

3.1%

Poverty rate

4.5%

Unemployment

267

Housing units

23.6%

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	86	16.5%
18 and over	436	83.5%
65 and over	161	30.8%
Median age	55.5 years

Race & ethnicity

White 90.5%

American Indian / Alaska Native 3.5%

Hispanic or Latino 3%

Other race 3%

Group	Count	%
White	487	90.5%
American Indian / Alaska Native	19	3.5%
Hispanic or Latino	16	3%
Other race	16	3%

Household income

Under $10k 2.0%

$15k–$25k 9.5%

$25k–$35k 11.9%

$35k–$50k 11.1%

$50k–$75k 21.7%

$75k–$100k 12.6%

$100k–$150k 19.4%

$150k–$200k 9.1%

$200k+ 2.8%

Range	% of households
Under $10k	2.0%
$15k–$25k	9.5%
$25k–$35k	11.9%
$35k–$50k	11.1%
$50k–$75k	21.7%
$75k–$100k	12.6%
$100k–$150k	19.4%
$150k–$200k	9.1%
$200k+	2.8%
Median income	$68,750

Housing

Home values

Under $50k 11.5%

$50k–$100k 7.0%

$100k–$150k 23.5%

$150k–$200k 7.0%

$200k–$300k 21.0%

$300k–$500k 23.0%

$500k–$1M 7.0%

Housing overview

Metric	Value
Median home value	$208,300
Median rent / month	$744
Owner occupied	79.1%
Renter occupied	20.9%
Vacant	20.9%
Single-family detached	70.3%
Large apartment buildings	0.0%
Mobile homes	18.8%
Median rooms	6.1
Avg household size (owned)	2.13

Year built

Era	%
2020 or later	1.9%
2010–2019	0.0%
2000–2009	30.3%
1990–1999	17.5%
1980–1989	12.5%
1970–1979	24.4%
1960–1969	5.6%
1950–1959	0.0%
1940–1949	0.6%
1939 or earlier	7.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	2.5%
2 bedrooms	34.1%
3 bedrooms	40.9%
4 bedrooms	19.4%
5+ bedrooms	3.1%

Vehicles per household

Vehicles	% of households
No vehicle	6.3%
1 vehicle	23.3%
2 vehicles	32.0%
3 or more	38.3%

Heating fuel

Fuel type	%
Utility gas	6.3%
Electricity	52.6%
Propane / LP gas	40.3%
Fuel oil	0.8%

Households & families

Household type	Count	%
Married-couple family	145	57.3%
Cohabiting couple	4	1.6%
Male householder, no spouse	68	26.9%
Female householder, no spouse	36	14.2%
Households with children under 18	51	20.2%
Households with seniors (65+)	114	45.1%
Average household size	2.06

Marital status

Status	Male	Female
Never married	16.1%	22.6%
Married	60.7%	66.8%
Separated	7.9%	0.0%
Widowed	6.2%	5.1%
Divorced	9.1%	5.5%

Education

Less than 9th grade 1.2%

Some HS, no diploma 4.3%

HS graduate 48.6%

Some college, no degree 15.6%

Associate's degree 6.7%

Bachelor's degree 14.7%

Graduate / professional 8.9%

Metric	%
HS diploma or higher	94.5%
Bachelor's or higher	23.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	11	19.3%
Elementary school	13	22.8%
High school	23	40.4%
College / grad school	10	17.5%

Employment

Industry of employment

Education & healthcare 27.6%

Arts, food & hospitality 15.1%

Construction 11.5%

Public administration 10.4%

Retail trade 9.3%

Finance & real estate 8.6%

Professional & management 5.7%

Wholesale trade 3.9%

Other services 3.9%

Agriculture & mining 2.2%

Information 1.1%

Manufacturing 0.7%

Occupation

Category	%
Management, business & arts	40.1%
Service	21.5%
Sales & office	20.1%
Natural resources & construction	13.3%
Production & transportation	5.0%

Employment type

Type	%
Private sector	63.1%
Government	21.9%
Self-employed	15.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	63.7%
Carpool	11.7%
Public transit	0.0%
Walk	10.3%
Other means	5.9%
Avg commute (minutes)	12.8

Poverty

All people 3.1%

Under 18 years 0.0%

18 and over 3.7%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	41.1%
Retirement income	33.6%
Supplemental Security	2.8%
Cash public assistance	3.2%
Food stamps / SNAP	7.1%

Health indicators

Condition	%
High blood pressure	30.5%
High cholesterol	31.2%
Heart disease	6.6%
Stroke	2.9%
Asthma	8.7%
Arthritis	23.7%
Kidney disease	2.8%
Pulmonary disease	5.7%
Cancer	7.1%

Behavior / access	%
Binge drinking	19.8%
No physical activity	21.2%
Less than 7 hrs sleep	27.7%
Fair or poor health	10.7%
Poor mental health	10.3%
Poor physical health	8.6%
No health insurance	11.1%
Visited doctor (checkup)	75.3%
Visited dentist	69.0%
Cholesterol screening	90.0%
Teeth loss	12.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	55	12.7%

Disability	%
Any disability	11.5%
Under 18	0.0%
18–64 years	2.6%
65 and over	32.9%

Health insurance coverage

Type	%
Private insurance	81.2%
Public insurance	37.7%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	497	95.2%
Spanish	16	3.2%
Other Indo-European	16	3.2%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	506	96.9%
Born in same state	506	96.9%
Born in different state	373	71.5%
Foreign born	0	0.0%
Naturalized citizen	16	3.1%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Arab	73	14%
Italian	61	11.7%
Polish	49	9.4%
French	33	6.3%

Ancestry	Count	%
English	17	3.3%
Dutch	13	2.5%
German	5	1%

Technology access

Metric	% of households
Computer access	48.5%
Internet access	95.3%

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

Frequently asked questions

What ZIP codes does Oacoma, SD have?

Oacoma, SD has one ZIP code: 57365. Each ZIP code serves a distinct delivery area within the city and surrounding region.