ZIP Code 57430 — Westwood Colony CDP, SD Demographics & Data

ZIP code 57430 covers Westwood Colony, SD in Marshall County with a population of about 1,916.

At a glance, the area shows median age of 47.4 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.

Westwood Colony, 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 57430 is about $71,563 — about 5% below the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 9.7%; unemployment rate near 0.6%; 19.5% of adults with a bachelor’s degree or higher (about 14.2 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Manufacturing, Healthcare, and Agriculture; about 0.8% of workers reporting work-from-home (about 14.4 points below the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Median home value is about $118,400 — about 66% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $680 (about 42% below the U.S. median rent ($1,163)), and owner-occupancy near 76.8% (about 11.3 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 57430 in Westwood Colony, SD, a household would need roughly $33,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $761. That sits below the local median household income ($71,563), suggesting the typical household income is closer to a workable buy-in level under these assumptions. Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

FEMA’s National Risk Index rates natural-hazard risk for Westwood Colony CDP, SD as Very Low (composite score 14.5), which is relatively lower than many U.S. communities. The strongest component scores on US5 are wildfire (76.6) and flood (10.4). 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 Westwood Colony CDP, SD show little to no average snow and around 24.3 inches of annual precipitation.

IRS migration statistics show a net inflow of about 118 for ZIP 57430 (Westwood Colony 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.