ZIP code · Buffalo · South Dakota · United States
ZIP code 57720 — Buffalo
ZIP code 57720 serves Buffalo, South Dakota.
- Postal code
- 57720Single source Value from one source, not cross-checked.
- City
- Buffalo
- County
- Harding FIPS 46063
- State
- South Dakota
- Country
- United States
- Coordinates
- 45.5740, -103.5826 — precision precise (locality)
View on OpenStreetMap - Population
- 561 (ZCTA, ACS 5-year)
- Population density
- 0 / sq mi
- Land area
- 1,296.2 sq mi (3,357 km²) (ZCTA, ACS 5-year)
- Median household income
- $78,333
- Per-capita income
- $56,565
- Median age
- 53
- Households
- 280
- Housing units
- 415
- Median home value
- $128,800
- Median gross rent
- $579 / 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 57720 with another ZIP · ZIPs within 25 miles · distance from 57720
Map of ZIP code 57720
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 11°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 34 | 45 | 56 | 66 | 77 | 86 | 85 | 75 | 58 | 44 | 34 |
| Avg low °F | 11 | 13 | 22 | 31 | 42 | 52 | 58 | 56 | 46 | 34 | 22 | 13 |
| Precip in | 0.3 | 0.4 | 0.5 | 1.4 | 2.5 | 2.1 | 2.2 | 1.1 | 1.1 | 1.1 | 0.3 | 0.3 |
NOAA 1991–2020 climate normals from the nearest station: BUFFALO ASOS (2.7 mi) · NOAA NCEI
Places in ZIP 57720
- 4 schools
- 1 supermarkets
- 1 restaurants & cafés
- 2 bars & pubs
- 3 parks
- 1 libraries
- 5 places of worship
- 1 banks
- 1 gas 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