ZIP code · Ferney · South Dakota · United States
ZIP code 57439 — Ferney
ZIP code 57439 serves Ferney, South Dakota.
- Postal code
- 57439Single source Value from one source, not cross-checked.
- City
- Ferney
- County
- Brown FIPS 46013
- State
- South Dakota
- Country
- United States
- Coordinates
- 45.3290, -98.0837 — precision precise (locality)
View on OpenStreetMap - Population
- 1 (ZCTA, ACS 5-year)
- Population density
- 3 / sq mi
- Land area
- 0.4 sq mi (1 km²) (ZCTA, ACS 5-year)
- Per-capita income
- $0
- Households
- 1
- Housing units
- 21
- 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 57439 with another ZIP · ZIPs within 25 miles · distance from 57439
Map of ZIP code 57439
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 5°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 22 | 27 | 40 | 56 | 68 | 77 | 82 | 80 | 73 | 58 | 41 | 28 |
| Avg low °F | 5 | 9 | 21 | 33 | 46 | 56 | 61 | 59 | 50 | 37 | 23 | 11 |
| Precip in | 0.6 | 0.6 | 0.9 | 2.0 | 3.2 | 3.9 | 3.8 | 2.7 | 2.5 | 2.2 | 0.8 | 0.8 |
NOAA 1991–2020 climate normals from the nearest station: ANDOVER #2 (10.4 mi) · NOAA NCEI
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