ZIP Code 83431

ZIP code 83431 is classified by USPS as a standard delivery area and covers roughly 32.7 square miles in Lewisville, Jefferson County, Idaho. The area is home to 876 residents, producing a population density of 27 people per square mile, and falls within the Boise time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 83431 against Idaho and the nation.

On the economic side, the median household income for ZIP 83431 sits at $90,833 (24% above the Idaho average), while per-capita income is $36,194. The poverty rate stands at 10.7% and the unemployment rate at 5.6%. On housing, the median home value is $241,700 (36% below the state average) with median rent at $917 per month, and 77.7% of occupied units are owner-occupied, a direct signal of whether 83431 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 21.5% of adults hold a bachelor's degree or higher, the median age is 36.4, and the average commute is —. We also surface 4 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Jefferson County, so you can benchmark 83431 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →