ZIP code · Oacoma · South Dakota · United States
ZIP code 57365 — Oacoma
ZIP code 57365 serves Oacoma, South Dakota.
- Postal code
- 57365Single source Value from one source, not cross-checked.
- City
- Oacoma
- County
- Lyman FIPS 46085
- State
- South Dakota
- Country
- United States
- Coordinates
- 43.7975, -99.3947 — precision precise (locality)
View on OpenStreetMap - Population
- 619 (ZCTA, ACS 5-year)
- Population density
- 10 / sq mi
- Land area
- 62.5 sq mi (161.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $63,611
- Per-capita income
- $47,481
- Median age
- 51.8
- Households
- 278
- Housing units
- 342
- Median home value
- $259,300
- Median gross rent
- $847 / month
- Congressional district
- SD At-large (119th Congress)
- USDA hardiness zone
- 5a (-20 to -15 °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 57365 with another ZIP · ZIPs within 25 miles · distance from 57365
Map of ZIP code 57365
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 11°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 35 | 47 | 59 | 70 | 81 | 88 | 86 | 77 | 62 | 46 | 34 |
| Avg low °F | 11 | 14 | 25 | 35 | 47 | 58 | 63 | 61 | 51 | 38 | 25 | 15 |
| Precip in | 0.4 | 0.6 | 1.1 | 2.3 | 3.2 | 3.6 | 2.2 | 2.3 | 2.1 | 1.6 | 0.5 | 0.5 |
NOAA 1991–2020 climate normals from the nearest station: CHAMBERLAIN MUNI AP (4.3 mi) · NOAA NCEI
Places in ZIP 57365
- 1 supermarkets
- 3 restaurants & cafés
- 2 bars & pubs
- 2 parks
- 1 post offices
- 1 banks
- 4 gas stations
- 1 EV charging stations
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