ZIP code · Glencross · South Dakota · United States
ZIP code 57630 — Glencross
ZIP code 57630 serves Glencross, South Dakota.
- Postal code
- 57630Single source Value from one source, not cross-checked.
- City
- Glencross
- County
- Dewey FIPS 46041
- State
- South Dakota
- Country
- United States
- Coordinates
- 45.4483, -100.9213 — precision precise (locality)
View on OpenStreetMap - Population
- 21 (ZCTA, ACS 5-year)
- Population density
- 0 / sq mi
- Land area
- 110 sq mi (284.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $197,500
- Per-capita income
- $109,400
- Median age
- 55.4
- Households
- 16
- Housing units
- 19
- 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/Denver (UTC−7 / UTC−6 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 57630 with another ZIP · ZIPs within 25 miles · distance from 57630
Map of ZIP code 57630
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 7°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 27 | 31 | 44 | 58 | 69 | 79 | 86 | 85 | 76 | 59 | 43 | 30 |
| Avg low °F | 7 | 11 | 21 | 32 | 43 | 54 | 59 | 58 | 48 | 35 | 22 | 11 |
| Precip in | 0.5 | 0.7 | 1.0 | 1.8 | 2.9 | 3.6 | 2.9 | 1.8 | 1.5 | 1.7 | 0.6 | 0.6 |
NOAA 1991–2020 climate normals from the nearest station: TIMBER LAKE (7.6 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