ZIP Code 83321

ZIP code 83321 is classified by USPS as a standard delivery area and covers roughly 229.2 square miles in Castleford, Twin Falls County, Idaho. The area is home to 550 residents, producing a population density of 2 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 83321 against Idaho and the nation.

On the economic side, the median household income for ZIP 83321 sits at $60,000 (18% below the Idaho average), while per-capita income is $26,022. The poverty rate stands at 14.8% and the unemployment rate at 5.7%. On housing, the median home value is — with median rent at $925 per month, and 66.7% of occupied units are owner-occupied, a direct signal of whether 83321 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 24.3% of adults hold a bachelor's degree or higher, the median age is 46.8, and the average commute is —. We also surface 1 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Twin Falls County, so you can benchmark 83321 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 →