Residential delivery area · South Dakota
ZIP Code 57430: Britton, SD
ZIP code 57430 uses the postal name Britton, South Dakota and lies entirely in Marshall County (Census 2020 ZIP-county file). About 1,800 people live there (Census Bureau, ACS 2020-2024). Median household income is $70,484 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Sunset Colony (under 1%), Westwood Colony (under 1%), Britton (under 1%) and Kidder (under 1%); more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Britton · its only residential ZIP
- County
- Marshall County
- Census places
- Sunset Colony (under 1%) census-designated place; Westwood Colony (under 1%) census-designated place; Britton (under 1%); Kidder (under 1%) census-designated place
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Central
- Land area
- 346.7 sq mi · 5 people per sq mi
Where is ZIP code 57430?
57430 centers on 45.835°, -97.720° and covers 346.7 square miles of land plus 3.5 of water. It borders 8 ZIP codes: 57421, 58043, 57247, 57454, 58017, 58032, 57270, 57446.
The map draws ZIP code areas only. For the streets inside 57430, 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 57430 compare with the rest of Marshall County?
| Measure | 57430 | In Marshall County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 1,828 | 2nd of 10 | 77th of 375 |
| Median household income | $71k | not ranked | not ranked |
| Median home value | $149k | not ranked | not ranked |
57430's median household income is not ranked: its 90% margin of error (±$18,419) is more than a quarter of the figure ($70,484); 57430's median home value is not ranked: its 90% margin of error (±$77,048) is more than a quarter of the figure ($149,200). 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 11% 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 57430?
The 2020 Census counted 2,123 people in 57430; the ACS, which samples households over 2020-2024, estimates 1,828. Between the 2010 and 2020 censuses its population fell 5.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,828±209 (90% margin)
- 2020 Census count
- 2,123−5.3% since 2010 (2,243)
- Households
- 756
- Median age
- 45.0
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 57430?
Of the 1,828 people the ACS estimates in 57430, 21.5% are under 18 and 24.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (93.3%).
- Under 1821.5%
- 18 to 6454.1%
- 65 and older24.4%
- White, not Hispanic93.3%
- Other or two or more3.8%
- Hispanic or Latino2.4%
- Asian, not Hispanic0.4%
- Black, not Hispanic0.1%
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 57430 earn?
Median household income is $70,484 (ACS 2020-2024). It is not measurably different from 2015-2019 ($84,591 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $70,484±$18,419
- Income per person
- $40,863
- Below the poverty line
- 8.7%
- Unemployed (of the labor force)
- 0.0%
- Adults 25+ with a bachelor's degree
- 23.2%
- Adjusted gross income per tax return, 2022
- $85,4501,010 returns; wages 51% 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 57430?
- Median home value (owners' estimate)
- $149,200
- Median gross rent
- $820
- Homes owned by their occupants
- 77.9%
- Housing units
- 1,004
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 57430?
96 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade13
- Construction11
- Other services (except public administration)11
- Professional, scientific, and technical services10
- Wholesale trade9
- Finance and insurance8
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 57430?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57421 | Amherst | 75 | – | 10.6 mi |
| 58043 | Havana, ND | 168 | $131k | 12.8 mi |
| 57247 | Lake City | 211 | $51k | 15.0 mi |
| 57454 | Langford | 732 | $81k | 15.6 mi |
| 58017 | Cogswell, ND | 296 | $61k | 15.7 mi |
| 58032 | Forman, ND | 769 | $85k | 17.0 mi |
| 57270 | Veblen | 764 | $78k | 18.7 mi |
| 57446 | Hecla | 223 | $44k | 21.0 mi |
| 57432 | Claremont | 507 | $113k | 18.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.