ZIP Code 57521 — Corn Creek CDP, SD Demographics & Data

ZIP code 57521 covers Corn Creek, SD in Mellette County with a population of about 245.

At a glance, the area shows median age of 14.5 versus a U.S. median of about 38.9.

It sits in telephone area code 605; U.S. House district SD-00; the RAPID CITY media market.

Median household income in ZIP 57521 is about $50,521 — about 33% below the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 22.9%; unemployment rate near 0.0%; 11.4% of adults with a bachelor’s degree or higher (about 22.3 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Retail trade, Agriculture, and Public administration; about 16.7% of workers reporting work-from-home (about 1.5 points above the U.S. share (15.2%)); a mean commute of about 30.0 minutes (U.S. average near 26.8).

Median home value is about $37,100 — about 89% below the U.S. median home value ($348,079).

Housing tenure and rents show owner-occupancy near 51.0% (about 14.4 points below the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 57521 in Corn Creek, SD, a household would need roughly $10,000 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 $238. That sits below the local median household income ($50,521), 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 Corn Creek CDP, SD as Very Low (composite score 5.2), which is relatively lower than many U.S. communities. The strongest component scores on US5 are wildfire (83.2) and flood (8.1). 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 Corn Creek CDP, SD show little to no average snow and around 20.4 inches of annual precipitation.

IRS migration statistics show a net inflow of about 15 for ZIP 57521 (Corn Creek 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.