Residential delivery area · South Dakota
ZIP Code 57481: Westport, SD
ZIP code 57481 uses the postal name Westport, South Dakota and lies mostly in Brown County (56% of its land), reaching into McPherson County and Edmunds County (Census 2020 ZIP-county file). About 270 people live there (Census Bureau, ACS 2020-2024). Median household income is $68,125 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Long Lake Colony (under 1%), Grassland Colony (under 1%), Westport (under 1%) and Wetonka (under 1%); more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- ZBP2023
- IRS2022
- Town
- Westport · its only residential ZIP
- County
- Brown County (56%); McPherson County (31%); Edmunds County (12%)
- Census places
- Long Lake Colony (under 1%) census-designated place; Grassland Colony (under 1%) census-designated place; Westport (under 1%); Wetonka (under 1%)
- Micro area
- Aberdeen, SD
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Central
- Land area
- 188.5 sq mi · 1 person per sq mi
Where is ZIP code 57481?
57481 centers on 45.663°, -98.683° and covers 188.5 square miles of land plus 0.3 of water. It borders 6 ZIP codes: 57426, 57441, 57401, 57456, 57433, 57451.
The map draws ZIP code areas only. For the streets inside 57481, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 57481 compare with the rest of Brown County?
| Measure | 57481 | In Brown County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 271 | 14th of 20 | 275th of 375 |
| Median household income | $68k | not ranked | not ranked |
| Median home value | $216k | not ranked | not ranked |
57481's income and home value are not ranked: it has fewer than 1,000 residents (271). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 5% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 57481?
The 2020 Census counted 536 people in 57481; the ACS, which samples households over 2020-2024, estimates 271. Between the 2010 and 2020 censuses its population fell 10.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 271±114 (90% margin)
- 2020 Census count
- 536−10.4% since 2010 (598)
- Households
- 121
- Median age
- 54.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 57481?
Of the 271 people the ACS estimates in 57481, 20.7% are under 18 and 24.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (93.4%).
- Under 1820.7%
- 18 to 6455.4%
- 65 and older24.0%
- White, not Hispanic93.4%
- Other or two or more6.3%
- Asian, not Hispanic0.4%
- Hispanic or Latino0.0%
- Black, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 57481 earn?
Median household income is $68,125 (ACS 2020-2024). It is not measurably different from 2015-2019 ($76,942 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $68,125±$22,811
- Income per person
- $37,896
- Below the poverty line
- 4.8%
- Unemployed (of the labor force)
- 0.0%
- Adults 25+ with a bachelor's degree
- 12.4%
- Adjusted gross income per tax return, 2022
- $60,788250 returns; wages 56% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 57481?
- Median home value (owners' estimate)
- $215,600
- Median gross rent
- –
- Homes owned by their occupants
- 95.0%
- Housing units
- 149
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 57481?
11 business establishments had a location in this ZIP code in 2023, 2 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 57481?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57426 | Barnard | 42 | $79k | 10.4 mi |
| 57441 | Frederick | 670 | $108k | 14.0 mi |
| 57401 | Aberdeen | 31,939 | $69k | 14.4 mi |
| 57456 | Leola | 670 | $76k | 15.8 mi |
| 57433 | Columbia | 318 | $50k | 17.6 mi |
| 57451 | Ipswich | 2,485 | $86k | 19.8 mi |
| 57427 | Bath | 384 | $84k | 21.7 mi (near) |
| 58439 | Forbes, ND | 385 | $74k | 22.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.