ZIP Code 57620 — Bison town, SD Demographics & Data

ZIP code 57620 covers Bison, SD in Perkins County with a population of about 590.

At a glance, the area shows median age of 46.1 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 57620 is about $73,500 — about even with the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 5.6%; unemployment rate near 0.0%; 23.2% of adults with a bachelor’s degree or higher (about 10.5 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Agriculture, Education, and Construction; about 24.8% of workers reporting work-from-home (about 9.6 points above 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 $92,100 — about 74% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $875 (about 25% below the U.S. median rent ($1,163)), and owner-occupancy near 77.1% (about 11.7 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 57620 in Bison, SD, a household would need roughly $25,000 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 $592. That sits below the local median household income ($73,500), 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 Bison town, SD as Very Low (composite score 2.6), which is relatively lower than many U.S. communities. The strongest component scores on US5 are wildfire (68.8) and flood (4.7). 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 Bison town, SD show little to no average snow and around 18.1 inches of annual precipitation.

IRS migration statistics show a net inflow of about 36 for ZIP 57620 (Bison town, 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.