Ferney, SD · standard

ZIP Code 57439

Brown County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

Compiled by PlainZIP Editorial Team, ZIP Code Data Editors · July 8, 2026

52
4/sq mi

ZIP code 57439 is a sparsely populated ZIP (a standard USPS delivery area) in Ferney, Brown County, South Dakota, home to just 52 residents across 13.0 square miles, a density of 4 people per square mile, in the Chicago time zone.

Median household income is not on file for ZIP 57439, but per-capita income is -. Local economic indicators show a - poverty rate alongside - unemployment. On housing, the median home value is - with median rent at - per month, and - of occupied units are owner-occupied.

Education and household profile round out the picture: - of adults hold a bachelor's degree or higher, the median age is -, and the average commute is -. A geography-based comparison follows: 1 ZIP codes within about 10 miles of 57439, plus 6 more within Brown County, give a clearer read than the national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 57439, Ferney, SD · 2023 Accessed 2026-07-08 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.