ZIP code · Bison · South Dakota · United States
ZIP code 57620 — Bison
ZIP code 57620 serves Bison, South Dakota.
- Postal code
- 57620Single source Value from one source, not cross-checked.
- City
- Bison
- County
- Perkins FIPS 46105
- State
- South Dakota
- Country
- United States
- Coordinates
- 45.5161, -102.4827 — precision precise (locality)
View on OpenStreetMap - Population
- 590 (ZCTA, ACS 5-year)
- Population density
- 2 / sq mi
- Land area
- 348.2 sq mi (901.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $73,500
- Per-capita income
- $42,363
- Median age
- 46.1
- Households
- 266
- Housing units
- 336
- Median home value
- $92,100
- Median gross rent
- $943 / month
- Congressional district
- SD At-large (119th Congress)
- USDA hardiness zone
- 4b (-25 to -20 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Denver (UTC−7 / UTC−6 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 57620 with another ZIP · ZIPs within 25 miles · distance from 57620
Map of ZIP code 57620
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 10°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 33 | 45 | 57 | 68 | 78 | 86 | 86 | 76 | 60 | 43 | 32 |
| Avg low °F | 10 | 12 | 22 | 32 | 43 | 52 | 59 | 57 | 48 | 35 | 23 | 13 |
| Precip in | 0.5 | 0.6 | 0.9 | 1.8 | 3.1 | 3.1 | 2.5 | 1.8 | 1.4 | 1.5 | 0.5 | 0.4 |
NOAA 1991–2020 climate normals from the nearest station: BISON (1.2 mi) · NOAA NCEI
Places in ZIP 57620
- 3 schools
- 1 restaurants & cafés
- 1 bars & pubs
- 2 parks
- 2 playgrounds
- 1 libraries
- 1 post offices
- 5 places of worship
- 1 banks
- 1 gas stations
- 2 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