ZIP code · Alpena · South Dakota · United States
ZIP code 57312 — Alpena
ZIP code 57312 serves Alpena, South Dakota.
- Postal code
- 57312Single source Value from one source, not cross-checked.
- City
- Alpena
- County
- Jerauld FIPS 46073
- State
- South Dakota
- Country
- United States
- Coordinates
- 44.1709, -98.3962 — precision precise (locality)
View on OpenStreetMap - Population
- 619 (ZCTA, ACS 5-year)
- Population density
- 5 / sq mi
- Land area
- 130.3 sq mi (337.4 km²) (ZCTA, ACS 5-year)
- Median household income
- $83,750
- Per-capita income
- $42,841
- Median age
- 40.8
- Households
- 251
- Housing units
- 251
- Median gross rent
- $867 / 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
- 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 57312 with another ZIP · ZIPs within 25 miles · distance from 57312
Map of ZIP code 57312
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 7°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 25 | 30 | 42 | 56 | 68 | 78 | 84 | 82 | 74 | 59 | 43 | 30 |
| Avg low °F | 7 | 11 | 22 | 33 | 46 | 56 | 62 | 59 | 51 | 37 | 23 | 12 |
| Precip in | 0.6 | 0.7 | 1.3 | 3.0 | 3.7 | 3.9 | 3.1 | 2.9 | 2.7 | 2.1 | 0.9 | 0.7 |
NOAA 1991–2020 climate normals from the nearest station: WESSINGTON SPRINGS (10.9 mi) · NOAA NCEI
Places in ZIP 57312
- 1 restaurants & cafés
- 1 post offices
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