ZIP code · Oldham · South Dakota · United States
ZIP code 57051 — Oldham
ZIP code 57051 serves Oldham, South Dakota.
- Postal code
- 57051Single source Value from one source, not cross-checked.
- City
- Oldham
- County
- Kingsbury FIPS 46077
- State
- South Dakota
- Country
- United States
- Coordinates
- 44.2457, -97.2696 — precision precise (locality)
View on OpenStreetMap - Population
- 181 (ZCTA, ACS 5-year)
- Population density
- 2 / sq mi
- Land area
- 78.8 sq mi (204.2 km²) (ZCTA, ACS 5-year)
- Median household income
- $46,250
- Per-capita income
- $60,155
- Median age
- 60
- Households
- 106
- Housing units
- 148
- Median home value
- $100,000
- Median gross rent
- $388 / 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/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 57051 with another ZIP · ZIPs within 25 miles · distance from 57051
Map of ZIP code 57051
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 5°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 24 | 29 | 41 | 57 | 69 | 78 | 83 | 80 | 73 | 58 | 42 | 28 |
| Avg low °F | 5 | 10 | 21 | 33 | 46 | 57 | 61 | 59 | 50 | 36 | 23 | 11 |
| Precip in | 0.8 | 0.8 | 1.4 | 2.6 | 4.0 | 4.1 | 3.2 | 3.1 | 2.5 | 2.1 | 1.1 | 0.6 |
NOAA 1991–2020 climate normals from the nearest station: ARLINGTON 1 W (9.5 mi) · NOAA NCEI
Places in ZIP 57051
- 2 bars & pubs
- 1 post offices
- 2 places of worship
- 1 banks
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