ZIP code · Delmont · South Dakota · United States
ZIP code 57330 — Delmont
ZIP code 57330 serves Delmont, South Dakota.
- Postal code
- 57330Single source Value from one source, not cross-checked.
- City
- Delmont
- County
- Douglas FIPS 46043
- State
- South Dakota
- Country
- United States
- Coordinates
- 43.2573, -98.1596 — precision precise (locality)
View on OpenStreetMap - Population
- 548 (ZCTA, ACS 5-year)
- Population density
- 5 / sq mi
- Land area
- 116 sq mi (300.5 km²) (ZCTA, ACS 5-year)
- Median household income
- $60,962
- Per-capita income
- $28,825
- Median age
- 35.5
- Households
- 184
- Housing units
- 227
- Median home value
- $150,700
- Median gross rent
- $625 / 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
- 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 57330 with another ZIP · ZIPs within 25 miles · distance from 57330
Map of ZIP code 57330
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 10°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 37 | 50 | 62 | 73 | 82 | 88 | 86 | 79 | 64 | 48 | 35 |
| Avg low °F | 10 | 14 | 24 | 35 | 46 | 58 | 62 | 60 | 52 | 38 | 25 | 14 |
| Precip in | 0.6 | 0.9 | 1.2 | 3.3 | 4.0 | 3.7 | 2.7 | 2.8 | 2.4 | 2.1 | 1.0 | 0.7 |
NOAA 1991–2020 climate normals from the nearest station: ARMOUR (10.3 mi) · NOAA NCEI
Places in ZIP 57330
- 1 schools
- 2 parks
- 1 post offices
- 3 places of worship
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