Willow Lake ZIP Codes — Clark County, SD

There is one unique ZIP code in Willow Lake, South Dakota and it is 57278. Area code: 605.

ZIP codes

157.59

sq mi land

1.25

sq mi water

605

area code

Willow Lake, SD ZIP code map

About Willow Lake, SD

Willow Lake is a quaint city located in South Dakota, known for its small-town charm and scenic beauty. Nestled in Clark County, this community offers a peaceful lifestyle with a close-knit atmosphere. Residents enjoy a blend of nature and community, making it a lovely place to call home.

Location & geography

Geographically, Willow Lake sits on a land area of 157.59 square miles, complemented by a water area of 1.25 square miles. It is positioned centrally in South Dakota, with nearby cities including Clark, approximately 11 miles to the west, and Florence, around 15 miles to the northeast. The terrain is characterized by a mix of flatlands and open spaces, contributing to the area's agricultural appeal.

Community & economy

Willow Lake exudes a welcoming community spirit, with residents often engaging in local events and gatherings. The economy is primarily supported by agriculture and small businesses, fostering a strong sense of community. Daily life is marked by friendly interactions and a slower pace, allowing for a strong connection among inhabitants.

Transportation

Transportation in Willow Lake is facilitated by State Highway 22, which runs nearby and connects to other regional roads. The nearest significant airport is Watertown Regional Airport, located about 30 miles to the east, providing access to greater travel opportunities. Public transit options are limited, emphasizing the community's focus on private vehicle travel.

History

Willow Lake was founded in the early 20th century and has maintained its agricultural roots throughout its history. Key industries have revolved around farming and local businesses, shaping the character of the town. Notable events include community fairs and seasonal celebrations that highlight the town's agricultural heritage.

Did you know?

A little-known fact about Willow Lake is that despite its small size, it encompasses a diverse range of natural landscapes. Additionally, the city is named after the nearby Willow Lake, which adds to its picturesque surroundings.

ZIP codes for Willow Lake, SD (1)

ZIP code	City	County	Map
57278	Willow Lake	Clark	View map

Demographics & statistics

972

Population

25.2

Median age

$60,536

Median household income

$23,895

Per capita income

$170,000

Median home value

$813

Median monthly rent

80.7%

Home ownership

5.8%

Poverty rate

0.0%

Unemployment

245

Housing units

19.0%

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	409	42.1%
18 and over	563	57.9%
65 and over	130	13.4%
Median age	25.2 years

Race & ethnicity

White 85.6%

Hispanic or Latino 5.4%

Other race 4.5%

Two or more races 3.4%

Black or African American 1.1%

Group	Count	%
White	880	85.6%
Hispanic or Latino	56	5.4%
Other race	46	4.5%
Two or more races	35	3.4%
Black or African American	11	1.1%

Household income

Under $10k 4.5%

$10k–$15k 3.7%

$15k–$25k 3.7%

$25k–$35k 4.9%

$35k–$50k 8.2%

$50k–$75k 32.1%

$75k–$100k 20.2%

$100k–$150k 7.0%

$150k–$200k 11.5%

$200k+ 4.1%

Range	% of households
Under $10k	4.5%
$10k–$15k	3.7%
$15k–$25k	3.7%
$25k–$35k	4.9%
$35k–$50k	8.2%
$50k–$75k	32.1%
$75k–$100k	20.2%
$100k–$150k	7.0%
$150k–$200k	11.5%
$200k+	4.1%
Median income	$60,536

Housing

Home values

Under $50k 7.7%

$50k–$100k 16.8%

$100k–$150k 15.3%

$150k–$200k 20.9%

$200k–$300k 24.5%

$300k–$500k 6.1%

$500k–$1M 5.6%

$1M+ 3.1%

Housing overview

Metric	Value
Median home value	$170,000
Median rent / month	$813
Owner occupied	80.7%
Renter occupied	19.3%
Vacant	16.8%
Single-family detached	93.8%
Large apartment buildings	0.0%
Mobile homes	1.0%
Median rooms	6.4
Avg household size (owned)	3.52

Year built

Era	%
2020 or later	0.0%
2010–2019	5.1%
2000–2009	9.9%
1990–1999	11.6%
1980–1989	4.8%
1970–1979	13.4%
1960–1969	9.6%
1950–1959	6.8%
1940–1949	3.4%
1939 or earlier	35.3%

Bedrooms

Size	% of units
No bedroom (studio)	1.4%
1 bedroom	5.5%
2 bedrooms	12.0%
3 bedrooms	33.6%
4 bedrooms	37.3%
5+ bedrooms	10.3%

Vehicles per household

Vehicles	% of households
No vehicle	1.6%
1 vehicle	14.0%
2 vehicles	27.6%
3 or more	56.8%

Heating fuel

Fuel type	%
Utility gas	31.3%
Electricity	41.2%
Propane / LP gas	25.9%
Fuel oil	0.4%
Wood	0.8%
No fuel used	0.4%

Households & families

Household type	Count	%
Married-couple family	168	69.1%
Cohabiting couple	5	2.1%
Male householder, no spouse	10	4.1%
Female householder, no spouse	60	24.7%
Households with children under 18	98	40.3%
Households with seniors (65+)	90	37.0%
Average household size	3.79

Marital status

Status	Male	Female
Never married	24.7%	25.9%
Married	64.0%	49.6%
Separated	0.0%	0.0%
Widowed	0.0%	19.6%
Divorced	11.3%	4.9%

Education

Less than 9th grade 5.7%

Some HS, no diploma 1.0%

HS graduate 42.9%

Some college, no degree 24.9%

Associate's degree 6.5%

Bachelor's degree 17.3%

Graduate / professional 1.6%

Metric	%
HS diploma or higher	93.3%
Bachelor's or higher	19.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	25	8.4%
Kindergarten	21	7.1%
Elementary school	154	51.9%
High school	88	29.6%
College / grad school	9	3.0%

Employment

Industry of employment

Agriculture & mining 42.9%

Education & healthcare 13.9%

Retail trade 10.2%

Arts, food & hospitality 9.4%

Construction 7.0%

Transportation & utilities 4.3%

Professional & management 4.3%

Wholesale trade 3.8%

Manufacturing 1.6%

Other services 1.6%

Finance & real estate 0.5%

Public administration 0.5%

Occupation

Category	%
Management, business & arts	46.9%
Service	5.6%
Sales & office	25.7%
Natural resources & construction	18.2%
Production & transportation	3.5%

Employment type

Type	%
Private sector	59.2%
Government	9.1%
Self-employed	30.8%
Unpaid family workers	0.8%

Commute

Method	%
Drive alone	56.6%
Carpool	5.9%
Public transit	0.0%
Walk	3.8%
Other means	1.8%
Avg commute (minutes)	16.9

Poverty

All people 5.8%

Under 18 years 1.9%

18 and over 8.3%

Married-couple families 0.6%

Female-led households 0.0%

Income support

Source	% of households
Social Security	37.0%
Retirement income	11.9%
Supplemental Security	2.5%
Cash public assistance	0.4%
Food stamps / SNAP	0.4%

Health indicators

Condition	%
High blood pressure	33.7%
High cholesterol	31.6%
Heart disease	7.8%
Stroke	3.6%
Asthma	8.9%
Arthritis	25.9%
Kidney disease	3.3%
Pulmonary disease	7.0%
Cancer	7.9%

Behavior / access	%
Binge drinking	18.9%
No physical activity	24.6%
Less than 7 hrs sleep	27.6%
Fair or poor health	12.7%
Poor mental health	10.6%
Poor physical health	9.8%
No health insurance	12.5%
Visited doctor (checkup)	75.5%
Visited dentist	66.6%
Cholesterol screening	88.8%
Teeth loss	15.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	32	5.7%

Disability	%
Any disability	7.4%
Under 18	5.6%
18–64 years	1.8%
65 and over	31.5%

Health insurance coverage

Type	%
Private insurance	70.5%
Public insurance	33.3%
Uninsured under 19	4.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	849	87.3%
Spanish	10	1.2%
Other Indo-European	10	1.2%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	950	97.7%
Born in same state	950	97.7%
Born in different state	839	86.3%
Foreign born	0	0.0%
Naturalized citizen	22	2.3%
Not a US citizen	2	9.1%

Ancestry

Ancestry	Count	%
Polish	209	21.5%
English	100	10.3%
Italian	92	9.5%

Ancestry	Count	%
French	27	2.8%
Arab	23	2.4%
Dutch	2	0.2%

Technology access

Metric	% of households
Computer access	25.0%
Internet access	88.1%

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

Frequently asked questions

What ZIP codes does Willow Lake, SD have?

Willow Lake, SD has one ZIP code: 57278. Each ZIP code serves a distinct delivery area within the city and surrounding region.