Town guide
Union
A township of 76 people in Davison County, South Dakota
From your neighbors
What’s happening
Weather
Forecast →Coming up
Upcoming events
Nothing on the calendar yet
Add an event →Put the next local happening — a market, a meeting, a concert — on the map.
Around town
All news →Local news
Headlines via Google News · Articles belong to their publishers.
The Union album
0 of 12 shotsNeighbors document Union together
Outdoors in Union
Parks & trails →Conserved land6.6%1,522 of 23,017 acres
Trails2.9 mi0.1 mi per sq mi
Parks & preserves0named on the map
Know a trail or park that’s missing? Anyone can add it to OpenStreetMap, and it shows up here on the next refresh.
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
Town numbers
ZIP codeSign in to add
Area codeSign in to add
Living in Union
Health in Union
Compared with South Dakota
≈Just like South Dakota
No difference on any of 26 measures is outside the margin of error.
BetterToo close to callWorse
What stands out
Nothing stands out: Union tracks South Dakota closely.
Care nearby
Avera Queen of PeaceMitchell · 13.4 mi · ER · rural critical access
Access Health - MitchellMitchell · 12.1 mi · sliding-scale fees
Primary careShortage · county-wide
DentalShortage · county-wide
Mental healthShortage · county-wide
CDC PLACES 2025 · modeled estimates for adults · ZIP codes 57363, 57375 · CMS · HRSAHealth in Union →
Natural hazards in Union
Moderate
Expected storm and flood damage is higher than in 49% of U.S. communities.
🌊 Inland flooding🌪️ Tornadoes🥶 Cold waves
FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Union →
Climate in Union
Full climate →Union has cold, snowy winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 8°, and about 41 inches of snow falls in a normal winter.
31° / 11°Winter
58° / 34°Spring
84° / 59°Summer
61° / 37°Fall
NOAA U.S. Climate Normals, 1991–2020Climate in Union →
Libraries near Union
See all →Nearest: Plankinton Community LibraryPlankinton · 12.3 miles · 10 hrs a week
Where Union is
Explore map →Imported town boundary
South Dakota · SD · Davison CountyTown boundary on OpenStreetMap →
Around town
Explore map →Bordering towns
How things work in Union
All explainers →No one has written Union’s explainers yetKnow how one of these works here? Each explainer earns +10 karma.