ZIP code · Britton · South Dakota · United States
ZIP code 57430 — Britton
ZIP code 57430 serves Britton, South Dakota.
- Postal code
- 57430Single source Value from one source, not cross-checked.
- City
- Britton
- County
- Marshall FIPS 46091
- State
- South Dakota
- Country
- United States
- Coordinates
- 45.8023, -97.7418 — precision precise (locality)
View on OpenStreetMap - Population
- 1,916 (ZCTA, ACS 5-year)
- Population density
- 6 / sq mi
- Land area
- 346.7 sq mi (898.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $71,563
- Per-capita income
- $40,825
- Median age
- 47.4
- Households
- 800
- Housing units
- 1,027
- Median home value
- $118,400
- Median gross rent
- $788 / month
- Congressional district
- SD At-large (119th Congress)
- USDA hardiness zone
- 4a (-30 to -25 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 605Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 57430 with another ZIP · ZIPs within 25 miles · distance from 57430
Map of ZIP code 57430
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 0°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 20 | 25 | 39 | 55 | 68 | 78 | 83 | 81 | 73 | 57 | 39 | 26 |
| Avg low °F | 0 | 5 | 18 | 30 | 43 | 54 | 58 | 56 | 47 | 34 | 19 | 7 |
| Precip in | 0.7 | 0.6 | 0.9 | 2.0 | 3.0 | 4.1 | 4.4 | 2.5 | 2.6 | 2.1 | 0.7 | 0.7 |
NOAA 1991–2020 climate normals from the nearest station: BRITTON (1.0 mi) · NOAA NCEI
Places in ZIP 57430
- 1 schools
- 1 hospitals & clinics
- 1 pharmacies
- 1 supermarkets
- 6 restaurants & cafés
- 1 parks
- 1 libraries
- 1 post offices
- 7 places of worship
- 3 banks
- 3 gas stations
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page