ZIP Code 57439 — Ferney CDP, SD Demographics & Data

ZIP code 57439 covers Ferney, SD in Brown County with a population of about 1.

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

Ferney, 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.

On socioeconomic markers, US5 shows a poverty rate of 0.0%.

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 Ferney CDP, SD as Relatively Low (composite score 73.5), which is elevated versus much of the country. The strongest component scores on US5 are wildfire (77.1) and flood (63.1). 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 Ferney CDP, SD show little to no average snow and around 24.0 inches of annual precipitation.

IRS migration statistics for ZIP 57439 (Ferney CDP, SD) are roughly balanced (near-zero net) on US5’s published series.