ZIP code · Ortley · South Dakota · United States
ZIP code 57256 — Ortley
ZIP code 57256 serves Ortley, South Dakota.
- Postal code
- 57256Single source Value from one source, not cross-checked.
- City
- Ortley
- County
- Roberts FIPS 46109
- State
- South Dakota
- Country
- United States
- Coordinates
- 45.2657, -97.1925 — precision precise (locality)
View on OpenStreetMap - Population
- 226 (ZCTA, ACS 5-year)
- Population density
- 5 / sq mi
- Land area
- 44.4 sq mi (114.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $66,250
- Per-capita income
- $32,103
- Median age
- 44.5
- Households
- 91
- Housing units
- 103
- 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/Chicago (UTC−6 / UTC−5 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 57256 with another ZIP · ZIPs within 25 miles · distance from 57256
Map of ZIP code 57256
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 2°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 21 | 26 | 39 | 55 | 68 | 77 | 82 | 80 | 73 | 58 | 40 | 26 |
| Avg low °F | 2 | 6 | 18 | 30 | 43 | 54 | 58 | 56 | 48 | 34 | 21 | 9 |
| Precip in | 0.7 | 0.7 | 1.0 | 2.3 | 3.2 | 4.0 | 4.1 | 3.0 | 2.8 | 2.5 | 0.9 | 0.7 |
NOAA 1991–2020 climate normals from the nearest station: SUMMIT 1 W (6.8 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