ZIP Code 57339 — Fort Thompson CDP, SD Demographics & Data

ZIP code 57339 covers Fort Thompson, SD in Buffalo County with a population of about 1,310.

At a glance, the area shows median age of 26.7 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.

Fort Thompson, 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 57339 is about $42,417 — about 44% below the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 36.5%; unemployment rate near 11.1%; 4.5% of adults with a bachelor’s degree or higher (about 29.2 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Public administration, Education, and Healthcare; about 9.6% of workers reporting work-from-home (about 5.6 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 $101,100 — about 71% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $395 (about 66% below the U.S. median rent ($1,163)), and owner-occupancy near 46.8% (about 18.6 points below the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 57339 in Fort Thompson, SD, a household would need roughly $28,000 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 $649. That sits below the local median household income ($42,417), 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 Fort Thompson CDP, SD as Very Low (composite score 13.7), which is relatively lower than many U.S. communities. The strongest component scores on US5 are wildfire (76.4) and flood (10.8). 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 Fort Thompson CDP, SD show little to no average snow and around 20.1 inches of annual precipitation.

IRS migration statistics show a net inflow of about 80 for ZIP 57339 (Fort Thompson 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.