ZIP code · Lemmon · South Dakota · United States

ZIP code 57638 — Lemmon

ZIP code 57638 serves Lemmon, South Dakota.

Postal code
57638
Single source Value from one source, not cross-checked.
City
Lemmon
County
Perkins FIPS 46105
State
South Dakota
Country
United States
Coordinates
45.9159, -102.1928 — precision precise (locality)
View on OpenStreetMap
Population
1,963 (ZCTA, ACS 5-year)
Population density
2 / sq mi
Land area
1,012.4 sq mi (2,622 km²) (ZCTA, ACS 5-year)
Median household income
$58,672
Per-capita income
$30,920
Median age
46.5
Households
805
Housing units
1,119
Median home value
$90,500
Median gross rent
$625 / 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/Denver (UTC−7 / UTC−6 DST)
Area code
605
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.

Climate — monthly normals

Warmest month Jul (avg high 87°F), coldest Jan (avg low 9°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F293345586979878677604432
Avg low °F91221324353595747352212
Precip in0.30.50.81.72.83.02.82.11.51.50.60.4

NOAA 1991–2020 climate normals from the nearest station: LEMMON (2.4 mi) · NOAA NCEI

Places in ZIP 57638

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