ZIP Code 57783

ZIP code 57783 is classified by USPS as a standard delivery area and covers roughly 608.1 square miles in Spearfish, Lawrence County, South Dakota. The area is home to 14,290 residents, producing a population density of 24 people per square mile, and falls within the Denver time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 57783 against South Dakota and the nation.

On the economic side, the median household income for ZIP 57783 sits at $74,844 (2% below the South Dakota average), while per-capita income is $46,492. The poverty rate stands at 14.0% and the unemployment rate at 1.9%. On housing, the median home value is $373,300 (95% above the state average) with median rent at $965 per month, and 58.6% of occupied units are owner-occupied — a direct signal of whether 57783 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 38.1% of adults hold a bachelor's degree or higher, the median age is 41, and the average commute is 17 minutes. We also surface 1 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Lawrence County, so you can benchmark 57783 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 →