ZIP Code 83428 — Irwin city, ID Demographics & Data

ZIP code 83428 covers Irwin, ID in Bonneville County with a population of about 589.

At a glance, the area shows median age of 56.1 versus a U.S. median of about 38.9.

It sits in telephone area codes 208, 986; U.S. House district ID-2; the IDAHO FALLS - POCATELLO media market.

Irwin, ID fits a retirement-oriented profile (older median age or known retirement-community context). Residents and relocators commonly research healthcare access, everyday amenities (dining, personal services), and housing costs rather than tech or campus life.

Median household income in ZIP 83428 is about $67,188 — about 11% below the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 5.6%; unemployment rate near 19.7%; 31.1% of adults with a bachelor’s degree or higher (about 2.6 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Agriculture, Construction, and Retail trade; about 12.3% of workers reporting work-from-home (about 2.9 points below the U.S. share (15.2%)); a mean commute of about 136.0 minutes (U.S. average near 26.8).

Median home value is about $540,400 — about 55% above the U.S. median home value ($348,079).

Housing tenure and rents show owner-occupancy near 94.7% (about 29.3 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 83428 in Irwin, ID, a household would need roughly $149,000 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 $3,471. That is about 122% above the local median household income ($67,188), so the median earner would likely stretch or need a larger down payment. 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 Irwin city, ID as Relatively Moderate (composite score 82.4), which is elevated versus much of the country. The strongest component scores on US5 are wildfire (90.3) and flood (78.6). 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 Irwin city, ID show little to no average snow and around 20.1 inches of annual precipitation.

IRS migration statistics show a net inflow of about 39 for ZIP 83428 (Irwin city, ID) 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.