PlainZIP

Willow Lake, SD · standard

ZIP Code 57278

Clark County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

748
2/sq mi
$70,208
Median income
$220,400
Median home value
25.5%
Bachelor's or higher

The verdict

Willow Lake pairs a below-median household income with below-median home values, in a rural, homeowner-dominated area.

47th pct
household income, US ZIPs
49th pct
home value, US ZIPs
2
people per sq mi
78%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57278 against every reporting US ZIP.

ZIP code 57278 is a sparsely populated ZIP (a standard USPS delivery area) in Willow Lake, Clark County, South Dakota, home to just 748 residents across 467.5 square miles, a density of 2 people per square mile, in the Chicago time zone.

ZIP 57278 lands in the middle-income range, with a median household income of $70,208 (8% below the South Dakota average), while per-capita income is $25,003. The poverty rate stands at 6.7% and the unemployment rate at 0.0%. The typical home here is valued at $220,400 (15% above the state average); renters pay a median of $808 monthly, and 77.6% of units are owner-occupied.

Educational attainment sits below the national norm: 25.5% of adults hold a bachelor's degree or higher, the median age is 24.6, and the average commute is -. Compare these figures to the South Dakota and national benchmarks above rather than reading 57278's numbers in isolation.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 57278

Top 5 sectors by establishment count in Willow Lake, SD

Which industries have the most business establishments in ZIP 57278.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 57278, Willow Lake, SD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

748

Population

467.5

Area (sq mi)

2

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 57278?

24.6

Median Age

51.3%

Male

48.7%

Female

2.8%

Foreign-Born

White 92.3%
African American 1.6%
Asian 1.7%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 4.5%
Hispanic or Latino 0.7%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$70,208

Median Household Income

-8% vs state

$25,003

Per Capita Income

6.7%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 57278 ranks nationally

Willow Lake, SD household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$70,208 47th percentile higher than 47% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 59.1%
Bachelor's Degree or Higher 25.5%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

285

Total Housing Units

255

Occupied Units

30

Vacant Units

3.66

Avg Household Size

Occupancy Type

Owner 77.6%
Renter 22.4%

$220,400

Median Home Value

+15% vs state

$808

Median Rent

1967

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 25 business establishments in ZIP 57278, employing approximately 135 people with a combined annual payroll of $7,318,000.

25

Businesses

135

Employees

$7.3M

Annual Payroll

3

Industry Sectors

Industry Establishments % of Total
Construction 9 36.0%
Finance and insurance 3 12.0%
Accommodation and food services 3 12.0%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

More ZIP Codes in Clark County

57225 standard
Clark, SD
Pop: 1,873
57434 standard
Conde, SD
Pop: 566
57258 standard
Raymond, SD
Pop: 385
57271 standard
Vienna, SD
Pop: 247
57217 standard
Bradley, SD
Pop: 244
57236 standard
Garden City, SD
Pop: 118

Related Areas

Clark County Willow Lake, SD South Dakota

Frequently Asked Questions

What county is ZIP code 57278 in? ▼
ZIP code 57278 (Willow Lake) is located in Clark County, South Dakota. Clark County contains multiple ZIP codes, see the full list at /counties/clark-sd.
What is the population of ZIP code 57278? ▼
ZIP code 57278 in Willow Lake, SD has a population of 748 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57278? ▼
The median household income in ZIP 57278 is $70,208, which is 8% below the national average of $76,288.
What is the average home value in ZIP 57278? ▼
The median home value in ZIP 57278 is $220,400, which is 21% below the national average of $278,155.
What is the demographic makeup of ZIP 57278? ▼
The largest racial group in ZIP 57278 is White at 92.3%. Hispanic or Latino residents make up 0.7% of the population.
How many businesses are in ZIP code 57278? ▼
ZIP code 57278 has 25 business establishments employing approximately 135 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 57278? ▼
The top industries by establishment count in ZIP 57278 are: Construction (9), Finance and insurance (3), Accommodation and food services (3). There are 3 industry sectors represented in total.
What is the education level in ZIP code 57278? ▼
In ZIP code 57278, 59.1% of residents aged 25+ have a high school diploma or higher, and 25.5% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 57278? ▼
In ZIP code 57278, approximately 77.6% of occupied housing units are owner-occupied and 22.4% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57278? ▼
The poverty rate in ZIP code 57278 is 6.7% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.