Union County, SD home prices

Union County, SD: the typical home is worth $358,095 as of 2026-05, up +4.2% over the past year and n/a since 2000. Listings run about $185/sq ft. Rent…

Data as of May 2026 · by the Real Estate Price Map data team · methodology & sources

1992: $118,382 → 2026: $358,095 (3.0×) pre-2000 estimated via FHFA index

Market read

At $358,095, homes in Union County sit 39% above the South Dakota median ($257,934) and 53% above the US median ($233,954). That ranks #6 of 50 South Dakota counties by price.

Prices are holding steady (+4.2% in the last year) — a balanced market.

Homes here move at a steady pace — a median 51 days on the market, with 18% of listings cutting their asking price.

At 3.7× local income, that's more affordable than the typical US county (~3.8×).

Prices here sit roughly in line with what local incomes and rents imply at the typical US multiple.

Renting looks cheaper — buying the typical home runs ~$1,768/mo (P&I, 20% down) vs $1,496/mo to rent.

Home value history

Zillow ZHVI, monthly from 2000 · recessions shaded. See the full 1975 history on the interactive map →

Nearby counties

Clay County, SD ($288,556) · Plymouth County, IA ($291,359) · Dixon County, NE ($198,418) · Sioux County, IA ($311,946) · Dakota County, NE ($245,072) · Lincoln County, SD ($383,538)