ZIP code · Saint Onge · South Dakota · United States
ZIP code 57779 — Saint Onge
ZIP code 57779 serves Saint Onge, South Dakota.
- Postal code
- 57779Single source Value from one source, not cross-checked.
- City
- Saint Onge
- County
- Lawrence FIPS 46081
- State
- South Dakota
- Country
- United States
- Coordinates
- 44.5473, -103.7232 — precision precise (locality)
View on OpenStreetMap - Population
- 300 (ZCTA, ACS 5-year)
- Population density
- 7 / sq mi
- Land area
- 41.1 sq mi (106.4 km²) (ZCTA, ACS 5-year)
- Per-capita income
- $82,333
- Median age
- 53.7
- Households
- 170
- Housing units
- 215
- Median home value
- $240,500
- Congressional district
- SD At-large (119th Congress)
- USDA hardiness zone
- 5b (-15 to -10 °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
- 605 (from the nearest rate centre)Telephone 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 57779 with another ZIP · ZIPs within 25 miles · distance from 57779
Map of ZIP code 57779
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 16°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 37 | 46 | 55 | 64 | 75 | 84 | 83 | 74 | 58 | 46 | 37 |
| Avg low °F | 16 | 16 | 24 | 32 | 42 | 51 | 58 | 56 | 48 | 35 | 26 | 18 |
| Precip in | 0.6 | 0.9 | 1.2 | 2.2 | 3.7 | 3.5 | 2.4 | 1.9 | 1.6 | 2.0 | 0.7 | 0.7 |
NOAA 1991–2020 climate normals from the nearest station: SPEARFISH (8.1 mi) · NOAA NCEI
Places in ZIP 57779
- 2 schools
- 1 bars & pubs
- 1 post offices
- 1 places of worship
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