Westport, SD · standard
ZIP Code 57481
Brown County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 598
- 1/sq mi Low-density area
- $68,125
- Median income Near-median income area
- $215,600
- Median home value Near-median home value
- 12.4%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Westport pairs a below-median household income with below-median home values, in a rural, homeowner-dominated area.
- 44th pct
- household income, US ZIPs
- 48th pct
- home value, US ZIPs
- 1
- people per sq mi
- 95%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57481 against every reporting US ZIP.
ZIP code 57481 is a sparsely populated ZIP (a standard USPS delivery area) in Westport, Brown County, South Dakota, home to just 598 residents across 460.0 square miles, a density of 1 people per square mile, in the Chicago time zone.
ZIP 57481 reports a modest median household income of $68,125 (11% below the average South Dakota ZIP), while per-capita income is $37,896. Both reported hardship measures are comparatively low in absolute terms: poverty is 4.8% and unemployment is 0.0%. Median home value is $215,600 (12% above the average South Dakota ZIP); 95.0% of occupied homes are owner-occupied.
Formal educational attainment runs low here: just 12.4% of adults hold a bachelor's degree or higher, the median age is 54.2, 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 57481.
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 →
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 57481, Westport, 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
598
Population
460.0
Area (sq mi)
1
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 57481?
54.2
Median Age
60.9%
Male
39.1%
Female
0.4%
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?
$68,125
Median Household Income
-11% vs state ZIP avg
$37,896
Per Capita Income
4.8%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 57481 ranks among South Dakota ZIPs
Westport, 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)
$68,125 36th percentile higher than 36% 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
149housing units
149
Total Housing Units
121
Occupied Units
28
Vacant Units
2.24
Avg Household Size
Occupancy Type
$215,600
Median Home Value
+12% vs state ZIP avg
1975
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 11 business establishments in ZIP 57481, employing approximately 48 people with a combined annual payroll of $3,735,000.
11
Businesses
48
Employees
$3.7M
Annual Payroll
1
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 3 | 27.3% |
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 57481, 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 Brown County
Related Areas
Frequently Asked Questions
What county is ZIP code 57481 in?
ZIP code 57481 (Westport) is located in Brown County, South Dakota. Brown County contains multiple ZIP codes, see the full list at /counties/brown-sd.
What is the population of ZIP code 57481?
ZIP code 57481 in Westport, SD has a population of 598 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57481?
The median household income in ZIP 57481 is $68,125, which is 11% below the national average of $76,288.
What is the average home value in ZIP 57481?
The median home value in ZIP 57481 is $215,600, which is 22% below the national average of $278,155.
What is the demographic makeup of ZIP 57481?
The largest racial group in ZIP 57481 is White at 93.4%.
How many businesses are in ZIP code 57481?
ZIP code 57481 has 11 business establishments employing approximately 48 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 57481?
In ZIP code 57481, 54.5% of residents aged 25+ have a high school diploma or higher, and 12.4% 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 57481?
In ZIP code 57481, approximately 95.0% of occupied housing units are owner-occupied and 5.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57481?
The poverty rate in ZIP code 57481 is 4.8% 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 57481's numbers, next.
- See how ZIP 57481 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Westport, SD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.