ZIP Code 57630 — Whitehorse CDP, SD Demographics & Data

ZIP code 57630 covers Whitehorse, SD in Dewey County with a population of about 21.

At a glance, the area shows median age of 55.4 versus a U.S. median of about 38.9.

It sits in telephone area code 605; U.S. House district SD-00; the SIOUX FALLS (MITCHELL) media market.

Whitehorse, SD is tagged as a Tribal Nation community context (place names indicate a tribal nation community). Local search often includes tribal government offices, public safety, and Indian Health Service (IHS) / wellness topics alongside standard ZIP demographics.

Median household income in ZIP 57630 is about $197,500 — about 163% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 0.0%; unemployment rate near 0.0%; 33.3% of adults with a bachelor’s degree or higher (roughly in line with the national share (33.7%)).

Labor and commute patterns include leading industry context around Agriculture, Professional services, and Public administration; about 33.3% of workers reporting work-from-home (about 18.1 points above the U.S. share (15.2%)); a mean commute of about 8.0 minutes (U.S. average near 26.8).

Housing tenure and rents show owner-occupancy near 100.0% (about 34.6 points above the national owner-occupancy rate (65.4%)).

FEMA’s National Risk Index rates natural-hazard risk for Whitehorse CDP, SD as Relatively Low (composite score 78.7), which is elevated versus much of the country. The strongest component scores on US5 are wildfire (83.0) and flood (17.4). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Climate normals for Whitehorse CDP, SD show little to no average snow and around 19.4 inches of annual precipitation.

IRS migration statistics show a net inflow of about 1 for ZIP 57630 (Whitehorse CDP, SD) on US5’s published series — a signal of people/tax filers moving in relative to those leaving. Inflows often track job growth, housing demand, or lifestyle migration; treat the figure as a directional indicator rather than a precise headcount.