Timber Lake ZIP Codes — Dewey County, SD

There is one unique ZIP code in Timber Lake, South Dakota and it is 57656. Area code: 605.

ZIP codes

389.44

sq mi land

1.92

sq mi water

605

area code

Timber Lake, SD ZIP code map

About Timber Lake, SD

Timber Lake, South Dakota, is a quaint small town nestled within Dewey County. Known for its intimate community atmosphere, Timber Lake offers a peaceful retreat surrounded by the natural beauty of South Dakota. The town provides a glimpse into the heart of rural America, where residents enjoy a tight-knit community and the simplicity of small-town living.

Location & geography

Timber Lake is located in Dewey County, in the north-central region of South Dakota. It is approximately 40 miles from the larger town of Mobridge and about 45 miles from the community of Eagle Butte. The city spans a vast land area of 389.44 square miles, with a small water area of 1.92 square miles, characterized by rolling plains and scenic landscapes.

Community & economy

The character of Timber Lake is distinctly rural and community-oriented, where residents often engage in local events and activities. The economy primarily revolves around agriculture and small businesses, reflecting the town's agricultural heritage. Daily life in Timber Lake is marked by a sense of camaraderie, with local gatherings and festivals playing a significant role in fostering community spirit.

Transportation

Timber Lake is accessible via South Dakota Highway 34, which connects the town to surrounding communities. The nearest named airports include the Mobridge Regional Airport and the Cheyenne River Airport in Eagle Butte, both providing vital links to larger cities. Public transit options are limited, typical of rural areas, with residents primarily relying on personal vehicles for mobility.

History

Timber Lake was founded in the early 20th century, gaining prominence due to its agricultural roots. Key industries have historically included farming and ranching, which remain crucial to the local economy today. Over the years, Timber Lake has hosted several community events that showcase its history and culture, reinforcing its identity within South Dakota.

Did you know?

One surprising fact about Timber Lake is that it is situated near the beautiful Lake Oahe, which is a popular destination for fishing and recreational activities. The town is also known for its local celebrations, which reflect the rich traditions and heritage of the community.

ZIP codes for Timber Lake, SD (1)

ZIP code	City	County	Map
57656	Timber Lake	Dewey	View map

Demographics & statistics

842

Population

32.8

Median age

$61,607

Median household income

$31,299

Per capita income

$87,200

Median home value

$500

Median monthly rent

72.5%

Home ownership

14.0%

Poverty rate

4.9%

Unemployment

282

Housing units

24.2%

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	262	31.1%
18 and over	580	68.9%
65 and over	120	14.3%
Median age	32.8 years

Race & ethnicity

White 51.5%

American Indian / Alaska Native 42%

Two or more races 4.1%

Hispanic or Latino 0.9%

Black or African American 0.7%

Asian 0.4%

Other race 0.4%

Group	Count	%
White	438	51.5%
American Indian / Alaska Native	357	42%
Two or more races	35	4.1%
Hispanic or Latino	8	0.9%
Black or African American	6	0.7%
Asian	3	0.4%
Other race	3	0.4%

Household income

Under $10k 9.8%

$10k–$15k 3.4%

$15k–$25k 4.9%

$25k–$35k 6.4%

$35k–$50k 14.7%

$50k–$75k 14.1%

$75k–$100k 15.6%

$100k–$150k 21.1%

$150k–$200k 6.1%

$200k+ 4.0%

Range	% of households
Under $10k	9.8%
$10k–$15k	3.4%
$15k–$25k	4.9%
$25k–$35k	6.4%
$35k–$50k	14.7%
$50k–$75k	14.1%
$75k–$100k	15.6%
$100k–$150k	21.1%
$150k–$200k	6.1%
$200k+	4.0%
Median income	$61,607

Housing

Home values

Under $50k 27.4%

$50k–$100k 31.6%

$100k–$150k 21.1%

$150k–$200k 3.0%

$200k–$300k 7.6%

$300k–$500k 7.6%

$500k–$1M 1.7%

Housing overview

Metric	Value
Median home value	$87,200
Median rent / month	$500
Owner occupied	72.5%
Renter occupied	27.5%
Vacant	12.1%
Single-family detached	71.8%
Large apartment buildings	0.5%
Mobile homes	10.2%
Median rooms	5.4
Avg household size (owned)	2.73

Year built

Era	%
2020 or later	0.8%
2010–2019	3.2%
2000–2009	5.9%
1990–1999	7.8%
1980–1989	13.2%
1970–1979	19.6%
1960–1969	10.8%
1950–1959	16.4%
1940–1949	3.8%
1939 or earlier	18.5%

Bedrooms

Size	% of units
No bedroom (studio)	1.1%
1 bedroom	17.2%
2 bedrooms	20.4%
3 bedrooms	35.2%
4 bedrooms	15.9%
5+ bedrooms	10.2%

Vehicles per household

Vehicles	% of households
No vehicle	4.3%
1 vehicle	30.6%
2 vehicles	32.1%
3 or more	33.0%

Heating fuel

Fuel type	%
Utility gas	0.6%
Electricity	35.2%
Propane / LP gas	58.7%
Fuel oil	3.4%
Solar	1.2%

Households & families

Household type	Count	%
Married-couple family	149	45.6%
Cohabiting couple	16	4.9%
Male householder, no spouse	78	23.9%
Female householder, no spouse	84	25.7%
Households with children under 18	133	40.7%
Households with seniors (65+)	99	30.3%
Average household size	2.49

Marital status

Status	Male	Female
Never married	35.7%	31.5%
Married	49.2%	50.2%
Separated	1.0%	0.3%
Widowed	2.4%	9.3%
Divorced	11.8%	8.7%

Education

Less than 9th grade 0.8%

Some HS, no diploma 3.9%

HS graduate 38.3%

Some college, no degree 21.4%

Associate's degree 11.4%

Bachelor's degree 14.3%

Graduate / professional 9.8%

Metric	%
HS diploma or higher	95.3%
Bachelor's or higher	24.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	39	17.3%
Kindergarten	5	2.2%
Elementary school	103	45.6%
High school	67	29.6%
College / grad school	12	5.3%

Employment

Industry of employment

Education & healthcare 37.4%

Agriculture & mining 14.0%

Public administration 12.6%

Construction 9.7%

Retail trade 7.8%

Transportation & utilities 5.6%

Arts, food & hospitality 4.0%

Other services 3.2%

Manufacturing 1.9%

Professional & management 1.6%

Information 1.3%

Finance & real estate 0.8%

Occupation

Category	%
Management, business & arts	48.4%
Service	13.7%
Sales & office	15.3%
Natural resources & construction	17.2%
Production & transportation	5.4%

Employment type

Type	%
Private sector	35.5%
Government	45.7%
Self-employed	18.3%
Unpaid family workers	0.5%

Commute

Method	%
Drive alone	74.2%
Carpool	4.1%
Public transit	0.0%
Walk	2.5%
Other means	0.0%
Avg commute (minutes)	22.1

Poverty

All people 14.0%

Under 18 years 16.4%

18 and over 12.8%

Married-couple families 5.4%

Female-led households 34.8%

Income support

Source	% of households
Social Security	28.1%
Retirement income	19.6%
Supplemental Security	2.8%
Cash public assistance	4.6%
Food stamps / SNAP	5.8%

Health indicators

Condition	%
High blood pressure	37.0%
High cholesterol	32.9%
Heart disease	9.3%
Stroke	4.8%
Asthma	10.6%
Arthritis	28.7%
Kidney disease	4.0%
Pulmonary disease	9.1%
Cancer	7.3%

Behavior / access	%
Binge drinking	18.2%
No physical activity	29.7%
Less than 7 hrs sleep	31.6%
Fair or poor health	18.4%
Poor mental health	13.1%
Poor physical health	13.1%
No health insurance	14.3%
Visited doctor (checkup)	76.2%
Visited dentist	61.3%
Cholesterol screening	87.3%
Teeth loss	21.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	42	7.2%

Disability	%
Any disability	7.5%
Under 18	2.7%
18–64 years	6.9%
65 and over	20.0%

Health insurance coverage

Type	%
Private insurance	68.0%
Public insurance	28.0%
Uninsured under 19	16.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	756	89.8%
Spanish	4	0.5%
Other Indo-European	1	0.1%
Asian & Pacific Islander	0	0.0%
Other languages	3	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	832	98.8%
Born in same state	832	98.8%
Born in different state	617	73.3%
Foreign born	0	0.0%
Naturalized citizen	10	1.2%
Not a US citizen	2	20.0%

Ancestry

Ancestry	Count	%
Arab	117	13.9%
Italian	66	7.8%
Polish	52	6.2%

Ancestry	Count	%
English	15	1.8%
French	4	0.5%

Technology access

Metric	% of households
Computer access	38.8%
Internet access	80.7%

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

Frequently asked questions

What ZIP codes does Timber Lake, SD have?

Timber Lake, SD has one ZIP code: 57656. Each ZIP code serves a distinct delivery area within the city and surrounding region.