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57481
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  3. ZIP Code 57481
South Dakota (SD)Brown CountyAberdeen605

ZIP Code 57481 — Westport, SD

Brown County * Aberdeen metro

Compare

271

Population

$68.1K

Median income

per household

$215.6K

Home value

4.8%

Poverty rate

What stands out

  • Median household income: $68.1K.
  • Median home value: $215.6K.
  • Poverty rate: 4.8% (low poverty; bottom quartile vs US ZIP codes).

Categories vs U.S.

Economy

1 of 4 metrics better than U.S. benchmarks

Median household income

$68.1K

U.S.

$81K

Per-capita income

$37.9K

U.S.

$45K

Median home value

$215.6K

U.S.

$333K

Housing stress

Affordability Ratios

Home-Value-to-Income

3.2×

Within typical 3-5x range

Income distribution

Share of households by income bracket (ACS).

Income distribution
Income bracketShare of households
< $50k24.0%
$50–100k46.3%
$100–200k22.3%
$200k+7.4%
< $50k
24.0%
$50–100k
46.3%
$100–200k
22.3%
$200k+
7.4%

Housing tenure

Owner-occupied vs renter-occupied housing (ACS).

Housing tenure
TenurePercent
Owners95.0%
Renters5.0%
95.0%
Owners
Owners
95.0%
Renters
5.0%

Health

3 of 6 available metrics better than U.S.

CDC PLACES modeled ZCTA-level estimates (adult prevalence).

Obesity

36.0%

U.S.

33.3%

Diabetes

12.0%

U.S.

12.0%

Current smoking

15.5%

U.S.

13.1%

Connectivity

3 of 3 metrics better than U.S.

100+ Mbps coverage

98.2%

U.S.

89.6%

Gigabit ready

77.8%

U.S.

46.1%

5G available

98.5%

U.S.

77.4%

Learning

Education metrics come from ACS 5-year estimates for ZIP Code Tabulation Areas (ZCTAs).

Bachelor's degree+ (age 25+)

12.4%

U.S.

35.7%

ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as noise.

School districts

Aberdeen School District 06-1

Map

ZIP 57481

Westport, SD

Population

271

Area

188.5 sq mi

Density

1.4/sq mi

Neighbors

574015742657433574415745157456

National Percentile Rankings

How this ZIP compares to other ZIP codes nationwide.

More Details

Census Tracts

3 tracts overlap this ZIP. Hover over segments to explore.

56%
31%
12%

Tract 9520

56.4%

Tract 9631

31.3%

Tract 9621

12.3%

Total tracts: 3Coverage: 100.0%

Congressional District Overlap

District Coverage

ZIP codes can span multiple congressional districts. Overlap percentages are approximate by land area and should be treated as geographic coverage, not address-level assignment.

100%

SD-AL

100%

Districts: 1Coverage: 100.0%

Data freshness

ACS 5-Year
2020–2024
CDC PLACES
2025
Broadband
2024-06-arcgis
Mobile
2025-11-24
Page Updated
2026-04-26

Release schedule and upstream dates: Sources.

Data sources

US Census Bureau (ACS 5-year)HUD USPS ZIP crosswalkUS Census TIGER/Line (geometry inputs)US Census TIGER/Line (school districts)US Census Bureau (ZCTA-to-tract relationship, 2020)US Census Bureau (2020 ZCTA-to-congressional-district relationship file, CD119)CDC PLACES (ZCTA)FCC Broadband Data Collection (fixed broadband)FCC (Mobile Broadband Data Collection)

Derived statistics

  • ZIP pages use Census ZIP Code Tabulation Areas (ZCTAs), not USPS delivery routes.
  • Population density is computed as population ÷ land area.
  • Overlap percentages (tracts and districts) are derived from map geometry and are approximate.

Data accuracy & methodology

ZIP pages combine 2020–2024 ACS 5-year ZCTA estimates with other public datasets when available (see Sources). Connectivity metrics use FCC coverage data, not ACS. ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as statistical noise rather than precise changes.

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