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 Low-density area
- $70,208
- Median income Near-median income area
- $220,400
- Median home value Near-median home value
- 25.5%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
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 average South Dakota ZIP), while per-capita income is $25,003. Both reported hardship measures are comparatively low in absolute terms: poverty is 6.7% and unemployment is 0.0%. Median home value is $220,400 (15% above the average South Dakota ZIP) and median rent is $808; 77.6% of occupied homes 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 -. No nearby ZIP peer set is available for this delivery area, so the South Dakota and national benchmarks above are the appropriate context for 57278.
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.
- Construction
Construction
9 establishments
- Finance and insurance 3
Finance and insurance
3 establishments
- Accommodation and food services 3
Accommodation and food services
3 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, 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
Who lives in ZIP 57278?
24.6
Median Age
51.3%
Male
48.7%
Female
2.8%
Foreign-Born
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 ZIP avg
$25,003
Per Capita Income
6.7%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 57278 ranks among South Dakota ZIPs
Willow Lake, SD household income vs. every South Dakota ZIP code
Median household income among 337 reporting South Dakota ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$70,208 40th percentile higher than 40% of 337 South Dakota ZIPs
Each bar is a $20K-wide band; taller bars hold more South Dakota 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
285housing units
285
Total Housing Units
255
Occupied Units
30
Vacant Units
3.66
Avg Household Size
Occupancy Type
$220,400
Median Home Value
+15% vs state ZIP avg
$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.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 57278, both outside SD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Clark County
Related Areas
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.
Related
Take this with you
What to do with ZIP 57278's numbers, next.
- See how ZIP 57278 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Willow Lake, SD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.